Hi Jim. Yes, you can do that. However, if you are past the recoat window for the product, it will require that you first scuff up the surface with 120-150 grit sandpaper to provide a proper mechanical bond. What that recoat window is depends on the product. What product exactly did you use? Epoxy paint is a commonly used and vague term that can mean 1-part epoxy paint (latex acrylic) or an actual 2-part epoxy coating.

Hello Chery. No, you cannot apply an oil-based clear coat over paint. Those clear coats are designed for wood floors and furniture, not garage floors. In addition, they have a yellow tint. Garage floor paint is not intended for clear coats, but there is a way to make it work if you accept the fact that it may still peel up from hot tires. We have an article here that gives you the information you need to know as well as a video here.

Hello MJ. The Rust-Oleum clear that you need to use is their newer 100% solids low VOC. You can view it here. It does not say to not use it in basements.

Both RockSolid and DuraGrade are low VOC coatings. DuraGrade is a higher quality product than RockSolid and is easier to apply. Taping down plastic is the initial test that can be done to check for moisture. It is ideally performed during the wet months of the year. Doing it during dry months may provide a false reading of no moisture.

Thanks for the answers, Shea!

So I was perusing Rust-Oleums site yesterday, and found that they explicitly call out not using their clear on basement floors in the FAQ. I was surprised by that. Do you have any idea why that might be the case?

Are RockSolid and DuraGrade also low-VOC and safe for indoors? DuraGrade has way more colors too! Seems like an interesting product, especially if I can avoid etching. The test you are referring to is taping down a square of plastic, right?