I have a rather large set of oak cabinets we are going to refinish in a couple of weeks. I proposed that we would do our best to fill the grain of the wood and my thought was to skim them with Fine Paints Swedish Putty to do so. I have used it a few times and it seems very good. Just curious as...

I'm painting my oak cabinets and want a smooth finish, but didn't discover wood grain filler(specifically AquaCoat) until after I primed them with oil based primer. I want to know if I can use the filler on top of the primer or if I have to sand down to bare wood.