What Paint Cannot Be Removed by Paint Stripper?

Some types of paint resist standard paint strippers due to their chemical composition or application method. Epoxy-based paints, powder coatings, and certain industrial-grade finishes (like polyurethane or two-pack paints) are particularly stubborn. These paints bond chemically with surfaces, making them difficult to dissolve with conventional solvents.

For example, powder coatings are baked onto surfaces, creating a durable layer that most strippers can’t penetrate. Epoxy paints, commonly used on garage floors or metalwork, cure into a hard, plastic-like finish. Two-pack automotive paints (used on high-end cars) also resist removal due to their cross-linked polymers.

If you’re dealing with these paints:

1. Test a small area first with a heavy-duty stripper (e.g., methylene chloride-based).
2. Mechanical methods like sanding or abrasive blasting may be necessary.
3. Seek professional advice for large-scale projects to avoid surface damage.

Paint stripper fails to remove paint that contains a hardener. Specific details and usage instructions are as follows:

Specific details:

Paint stripper can remove the following coatings: nitrocellulose lacquer, alkyd paint, acrylic paint, polyester amino baking paint, two-component paint, and some epoxy paints. Other paints are difficult to remove with paint stripper.

How to use paint stripper:

Shake the paint stripper well, spray it onto the painted surface to be stripped, and wait 5 to 8 minutes for it to fully dissolve and lift the paint. Once the paint has dissolved, wipe it clean with a cloth. For stubborn paint, use a brush to scrub, and rinse with water if necessary. For unknown materials, test on a small area first; if no adverse reaction occurs after 10 minutes, proceed with use. Paint stripper is corrosive—avoid contact with eyes and skin. Store away from direct sunlight and keep away from fire sources. Always ensure adequate ventilation during application.

From a DIY perspective, avoid assuming all strippers work universally. Water-based acrylics and latex paints usually yield to standard removers, but older lead-based paints (pre-1980s) require specialist handling due to toxicity. Always check the paint type and stripper compatibility—some require ventilation or protective gear. For stubborn cases, sanding or heat guns are safer alternatives.