How to Paint Over Rust

Mastercoat® will help you paint over rust. We know that painting over rust can be a problematic. In fact, it’s not considered an optimum thing to do. Rather, you should only paint over rust in situations where sandblasting is prohibited or not economically feasible. Painting over rust has long been a tedious, time consuming chore. With Mastercoat® you can apply your paint over marginally prepared rusty surfaces. Mastercoat® stops rust for longer than any competitors’ product.

Founded in 1988, our company wanted to create the most powerful rust sealers and topcoats in the world. We feel with Mastercoat®, we have met and even exceeded that goal. In the past nearly 30 years, we’ve shown that nothing outperforms Mastercoat® in salt spray tests. Our anti‑graffiti subway coating withstood constant washing with solvents and alkali cleaners on NYCTA subway cars. After ten years, the subway cars retained their gloss and color. Mastercoat® is excellent for chassis and underbody protection on any vehicle.

The fact is that most metal rusts at some point especially if it contains even a small bit of iron. Why? The metal will oxidize when exposed to air and moisture. This oxidation is easy to spot. It has a reddish‑brown color and has a tendency to powder or flake off. Rust creates hard bubbles under paint which causes eruptions that can erode the metal and over time the metal can crumble altogether. Use Mastercoat® to protect your metals.

First, you should identify the type of metal you are going to paint. Cast iron, steel and galvanized steel have different qualities and may require different products from our MasterSeries. Next, you should evaluate the environmental conditions where the metal is located. Metal surfaces exposed to the weather face radically different conditions than metal inside a structure. Make sure to choose the correct Mastercoat® for your specific application.

Begin by tackling the rust itself. You should scrape off all the rust you can. Many people use a Dremel to remove rust, debris, and old paint. We suggest that you use a wire wheel and grinder instead. They are more useful than a Dremel tool to get rid of rust. You can also use a hardened metal scraper or shave hook. A shave hook consists of a sharp edged triangle‑shaped steel plate attached to a handle. Do you have stubborn layers of old paint? No problem. Use a paint stripper to eliminate what the scraper missed.

Now, you should sand the metal surface with medium to coarse grit sandpaper. This will get down to the bare metal. You should use a soft utility brush or clean cloth to remove any particulates or remaining abrasives. It is important to work with a clean surface when painting over a rusted area. Our paint and primer will adhere better to the metal this way. The application process will also go more smoothly and result in a cleaner, more professional looking job.  If your metal is dirty or covered in grease of any kind, you should wash the surface of the metal with mineral spirits. You need the surface to be clean before you attempt to paint over rust. That’s why we suggest you use Master Coat metal prep for cleaning the surface prior to using the Master Coat Sealer. You want to put at least two coats of the sealer on prior to painting.

Wait until everything is completely dry. Now, you can begin to paint over the rusted area. Apply several thin coats, making sure that each is completely dry before you add another one. It’s important that you remain patient and allow the paint to dry between coats. Otherwise, you can have problems like bubbling, cracking and wrinkling of the paint finish.

We can provide you with expert technical assistance by contacting us at 1-800-833-8933. To learn more about painting over rust and to check out our entire product line, please visit our website at http://www.masterseriescoatings.com/index/. We look forward to providing you with the materials you need to complete your next paint job over rust.

Mastercoat Distributors Wanted!

Do you love Mastercoat? Do you want it at wholesale prices? We’re looking for a few enthusiastic Mastercoat users who would be interested in dealing our products at spring and fall Carlisle and the Englishtown swap meet. We are also looking for shops around the U.S. to resell Mastercoat products. Give us a call at 1-800-833-8933 to inquire!

When you can’t remove all the rust, Mastercoat® is the answer.

Mastercoat® can even be applied over marginally prepared surfaces. If sandblasting is not an option, Mastercoat® has got you covered. Mastercoat® stops rust much longer than the others, so if NO MORE RUST is your goal, don’t settle for cheap imitations. Every day low prices here!


This bridge in Pittsburgh, PA was marginally prepared using wire wheels and grinders. Due to a lead paint hazard, it was overcoated with two coats of permanent rust sealer and one coat of 111 topcoat. An inspection 14 years later revealed less than 5% corrosion.

Mastercoat® AG111 is the ultimate chassis paint. It does 14,000 hours of salt spray, is UV stable, and will not rust beyond a scratch! Compare that to KBS, POR-15, and the others.

AG111
Designed for the subway systems where graffiti and corrosion are major problems, our super durable and UV stable AG111 is unsurpassed for chassis protection. One quart does an ENTIRE ROLLING CHASSIS!

The Mastercoat® Difference. Mastercoat® Primer / Sealer / Surfacer Stops Rust Longer Than the Others & Improves Your Body Work Dramatically.
Mastercoat
1957 Oldsmobile J2 completely primed inside and out with Mastercoat® Permanent Rust Sealer/Surfacer/Primer then finished with a gorgeous jet black paint job, showcased at Hershey. Photo courtesy of Vintage Auto, Fort Mill SC.

Industrial Rust Remove
Unlike the competition, sunlight is not a problem for Mastercoat®.

SPECIAL! MASTERCOAT® ULTIMATE CHASSIS KIT AVAILABLE FOR $79.95. Includes QUART of AG111 with hardener, QUART of Mastercoat® Sealer/Primer/Surfacer, and QUART of MCT101 thinner.

What makes Mastercoat® different than the others? Click here to find out!

The MasterSeries Coating Line was founded in 1988 because we wanted the most powerful rust sealers and topcoats in the world. Our permanent rust sealer has demonstrated for the last 30 years that nothing outperforms it in salt spray tests. Our salt spray tests run from 8000 to 14,000 hours. Our AG111 anti-graffiti subway coating withstood constant washing with solvents and alkali cleaner, when used on NYCTA subway cars. At the end of 10 years, the subway cars still maintained a high gloss and color retention.  This is excellent for chassis and underbody protection on any vehicle.

Stops rust permanently and levels heavy pitting…GUARANTEED!

“The best bar none!” – Auto Restorer Magazine, June 2000.


NEW PRODUCTS! We have high grade premium industrial floor coatings in both epoxies and urethanes, with and without flakes, and anti-slip at prices below the competition. Call us or email us for information and ordering!

We can ship to Canada! Please email us for rates.

Feel free to contact us with any questions, comments, or suggestions. You can email us at pmmasterseries@gmail.com or you can call us at 1-800-833-8933 from 9am-5pm EST. Dealer inquiries welcome.




The Mastercoat® Difference. Mastercoat® Primer / Sealer / Surfacer Stops Rust Longer Than the Others & Improves Your Body Work Dramatically.

GET RID OF THE PITS!
Rust Remover For Cars \
This 1938 Packard radiator shell was severely pitted under the hood ornament. Three coats of Mastercoat® Permanent Rust Sealer Silver followed by lacquer primer and paint, produced a flawless, show quality finish. Mastercoat® Silver is the ONLY type of moisture cured urethane that is air tight! Resin blocks the moisture, and aluminum pigment cuts off the oxygen. Unlike the others, Mastercoat® Silver is also UV STABLE, paintable, sandable.

Mastercoat® Permanent Rust Sealer/Surfacer/Primer is the ultimate in corrosion protection. This primer/surfacer/sealer is the only type that seals the metal with both a moisture and oxygen proof barrier, where new rust can’t form and old rust can’t continue. Aside from its heavy corrosion resistance, it’s surfacing abilities are second to none. In body work, it will hide a multitude of sins like pitting, sand swell marks, and putty that’s not quite perfect. If you’re an amateur body man or professional alike, Mastercoat® Permanent Rust Sealer/Surfacer/Primer can make the difference, and it saves time and work. Unlike epoxies, Mastercoat® Primer will run thousands of hours of salt spray resistance. Automotive epoxies will generally run 500-1000 hours. Many shops use our primer as a base to prevent comebacks. Buy Mastercoat® Primer here!

NEW! Now introducing our higher build version of Mastercoat® Permanent Rust Sealer: Mastercoat® EXTREME for the deepest pits! It’s also toothier for topcoat adhesion. It has a paste-like consistency for deep pitting. Do you find using metal body fillers time consuming and tedious? Mastercoat EXTREME® has you covered. It’s as easy as reducing and shooting through your gun to fill in those pits, even in contours. $42.95 per quart. Buy it here!

Ultimate Rust Repair

The ultimate rust repair consists of combining the old technology, such as Mastercoat Metal Prep & Rust Remover with the newer technology, which is the Mastercoat Permanent Rust Sealer/Surfacer/Primer, which we then apply over the metal prep treated surface. The metal prep acid treatments dissolve the rust and leave a zinc phosphate coating behind to inhibit further rusting. This has been successful for decades. At Mastercoat, we take it a step further–we combine the acid and put an air tight seal over it. This is what we refer to as the “Double Whammy”. Please see our helpful tip sheet.

For car and motorcycle guys, there’s nothing worse than rust. It’s like a cancer that destroys the machines we love and we’ll try anything if it’ll give us a chance at bringing an old metal beauty back to life. At least that’s how the car and motorcycle guys who developed Mastercoat felt.

Developed by car and motorcycle guys for car and motorcycle guys, Mastercoat Metal Prep and Rust Remover is a fast acting rust remover that can eat through rust in as fast as five minutes. Unlike the competition, our product contains zinc and can keep stored parts free of rust for an entire year. Our product is reusable and is available in quarts, half gallons, and gallons.

Mastercoat Metal Prep and Rust Remover is the perfect weapon against light to moderate surface rust. Our remover has a detergent effect against grease and oil and neutralizes rust from the inside out. Because of its powerful rust fighting abilities, Mastercoat also works as a pre-paint metal treatment to fight the formation of rust on metal surfaces and can prolong the life of your paint job by years.

Mastercoat Metal Prep and Rust Remover is so easy to apply that even an amateur restorer can use it. Our product can be sprayed, brushed, or wiped on metal surfaces. Simply apply it to surfaces and let it sit before lightly scrubbing. Allow the product more time to soak into the rust on heavier rust formations. Scruff areas of rust with a nylon pad until the surface is smooth and clean. With the surface of the metal still wet with Mastercoat, use a clean cloth to wipe the surface of the metal in an even direction – not in a circular motion.

After wiping the area clean, soak any remaining rust spots with a shop towel or clean cloth for between 20 minutes and 2 hours. Buff the remaining rust spots with a buffing pad and rewet with Mastercoat. Buff the area again until the rust is removed and dry the area with a paper towel – you should not let the area air dry. While you dry the area, remember to wipe in a smooth and even direction, not in circles. Allow the surface to dry for 2-3 hours, reapply Mastercoat, dry with a lint free cloth, allow another 2-3 hours for the Mastercoat to cure, apply primer, and paint.

Mastercoat Metal Prep & Rust Remover is excellent for cleaning out and helping prevent the formation of rust in gas tanks. The Mastercoat solution will dissolve the rust and etch the galvanized metal to ensure an even distribution of the solution over the surface area.

In the event of a spill accident, Mastercoat Metal Prep can be neutralized with regular tap water.

After just one use, we’re confident that you’ll fall in love with Mastercoat Metal Prep & Rust Remover and trust it to protect all of your favorite metal surfaces. For more information on how to order your own supply of rust remover, contact Mastercoat today.

PM Industries
939 Westbrook Road
West Milford, NJ 07480

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This clear coating is used on commercial jet aircraft, offers an extreme high gloss, and is far superior to your average automotive clear coats. This clear sands and buffs out beautifully, is fast drying, low odor, has great chip resistance, and will provide many years of outstanding service. Also available in gloss black, hot rod black (satin), white, bright red, and fleet colors upon request. Click here for more info and to buy it now!