DIYbanter - View Single Post - can I polyurethane over flat latex paint?

wrote:

I'm painting some wood storage cubes for my sons' bedroom. I'd like to use
some of the extra wall paint so I don't have to buy more. We used Ben Moore
washable flat latex on the walls, but I'd like to have a bit more gloss on
the cubes. Can I put a few coats of clear polyurethane over the paint when
I'm done to give it the gloss, or do I have to go out and buy gloss paint in
the same color (something I'd like to avoid). If I can, should I use water
or oil-based polyurethane?
Thanks.
-Holly

You can and the poly will do a good job of protecting the paint. I would use
water base polyurethane and put on several coats.