There shouldn't be any need to apply a second coat of FE-123. If you don't see the reaction as described, please contact Rustbuster for advice. There is no need to sand or wipe clean the surface before painting (unlike some other products).
Yes, you can paint over a rust converter. Here's how: Prime the Surface: After drying, apply Haymes MetalPlus Universal Primer for better adhesion.
After the Rust Converter has completely dry, it is recommended to wipe the surface with a damp cloth to remove all excess Rust Converter before you apply the oil-based paint. Rust Converter will glaze coat the non-rusted areas causing the paint not to adhere to those areas as well.
The rust converter will dry in 20 minutes however it takes 24 hours to cure. Application of a second coating will ensure proper rust conversion. If applying an oil-based top coat, wait 48 hours after the last coat to ensure it has proper time to cure. Always read the safety precautions provided on the bottle.
Before using Rust Converter, ensure the surface is free from grease, oil and dirt, as this can interfere with the chemical reaction. Use a wire brush or sander to remove any loose rust and paintwork, this will help the converter penetrate deeply into the rust.
What type of paint should I use to cover the Rust Converter? Use oil based or epoxy paints to paint over Rust Converter, do not use Latex or water based paints.
Allow 48 hours of cure time before the application of the finished paint coat (humid conditions may vary drying time). For long-lasting protection, the cured rust converter coating should be sealed with two coats of high-quality oil-based paint. No other primer is required.
Rust Prevention
Dry it off with a towel (no, not the decorative ones -- those are for guests). Then, get it completely dry with a hair dryer. Next, depending on what you have planned for it, cover it with a generous coating of WD-40, 3-in-1 oil, a rust preventative (Boeshield T-9), or paint it.
The result of a rust remover provides a bare metal surface that will require further process treatments. The result of a rust converter is best used for corrosion control and things that you may want to eventually paint – think boats, car bodies and fences.
Painting over rust converter
Though it is not compulsory, it's a good idea to use 2 coats of good quality metal primer / paint to cover the surface and prevent any further rust from developing on the surface.
If the surface is rusted or has peeling paint, remove with a wire brush, sandpaper or chemical rust remover. Making sure the surface is as smooth as possible will help the new paint finish adhere properly. Lightly sand any glossy areas to dull the finish.
Navy jelly works very well .. It will remover rust .
BLACK-MAX Rust Converter, Rust Sealer & Rust Neutralizer transforms the rust into a protective black-polymer coating that eliminates the need for sanding or sandblasting. This coating stops the rusting process, transforms and primes the surface, leaving behind a beautiful black finish.
If you sand down to bear metal and spray with Rustoleum enamel, the metal will be protected from oxidation, UV exposure etc. and it will be a long time before you see any rust again.
Apply Rust-Block™. Spray or wipe it on the surface of any exposed metal. Seal. Touch up nicks and scrapes with a coat of primer, automotive paint, and sealant.
Once you have left the rust remover on the metal for 5-10 mins, it is time to scrub away the rust! Using your wire brush, scrub the rusted area that has the roughest grain and gradually move to the more minor rusty metal areas.
WD-40 can help remove rust from metals like iron, chrome, and stainless steel without further damaging the surface of the metal or removing the paint. The Multi-Use Product is great for loosening and removing excessive surface rust.
Speaking with the FLAG Rust Converter rep they specify that it is generally only compatible under single-pack solvent-based paints. However, we have personally used it under epoxy primers, with no noticeable negative effects.
Brush: Stir contents before using. Pour a small amount of Rust Reformer into a separate non-metallic container. Brush the material evenly across the surface to be coated. The Rust Reformer will dry to a black film in about 15 minutes.
There is no need to sand or wipe clean the surface before painting (unlike some other products). However, if you see some toffee-coloured areas this is likely to be FE-123 that hasn't had corrosion to work with. This should be removed with fine sanding prior to painting.
POR-15 Metal Prep Metal Etching Rust Neutralizer
After thoroughly degreasing your work piece, apply environmentally safe POR-15 Metal Prep to both neutralize any rust and etch any clean bare metal. This will allow better adhesion of POR-15 Rust Preventive Coating or any other coating.
If rust has thinned or eaten through the panel, then the Bondo needs a backup. Fiberglass sheets, metal mesh or fiberglass screen can be used. Once you have a good surface to work with, mix body filler with a spatula or plastic scraper on a piece of cardboard.