Howard asks: I’m repainting my house, but I’m not sure what kind of paint was originally used. Can I use latex over oil, or should it be the other way around?
Danny Lipford: Now, that’s a great question. But before we answer the question, we have to determine exactly what kind of paint you have on your woodwork right now. Here’s an easy way to determine that. First of all, take some denatured alcohol, put it on a rag, wipe the woodwork, and if any paint comes off on the rag, then you have latex paint.
Now, you never want to paint oil over latex. It just won’t stick. But you can paint latex over oil-based paint, if you prepare the surface properly. First of all, take a little bit of sandpaper and just lightly sand it. Then you want to use some trisodium phosphate, or TSP, you can find it in any paint store or home center. Then, after that dries, use a good bonding primer. Put one coat of primer on it. After that dries, you’re ready to finish up the paint job, and you’ll know that it’ll last.
This post originally appeared on Today’s Homeowner
For more information on this topic check out:
- Applying Latex Paint Over Oil-Based Paint (video)
- Homeowner’s Guide to Paint Primer (article)
- When to Prime Before You Paint (article)