I wanted to seal a piece of MDF I was using as a work surface.
I first applied linseed oil. When that fully dried I put on a coat of oil based polyurethane. It's been TWO weeks and it still hasn't dried - extremely tacky.
Will this not cure over linseed oil? I want to seal all hardwood (""masonite") painting panels with linseed oil but don't want any surprises. I wouldn't use an oil based polyurethane since I paint with acrylics, but are there finishes that should not be used over linseed oil.
btw my current favorite painting (not panel) sealer is water-based shellac.