I am refinishing my kitchen cabinets. I have sanded them, painted two coats of paint and then glazed them. I have put one coat of polyurethane on them, and am trying to put a second coat on. When I try to sand them, it is taking the finish off. I first tried sanding lightly with 220 grit and have now tried with 400 grit sandpaper and am having the same problem. I have tried in an unobvious place and am barely touching it with the sandpaper. What should I do?
What type of paint/glaze? Oil or water based poly? Check with manufacturer of the poly to make sure it's compatible with previous top coats. The ones I've called in the past have always been very helpful.
How long did you let paint/glaze cure before poly? Even though paint dries within hours it takes a while to fully cure. If you apply the poly before it cures you'll have problems with the poly curing. Should wait at least 7 days before applying poly. More depending on climate.