I have a question about using oil based enamel paint. I recently refinished an old wooden dresser that had a few coats of primer on it. The primer went on smoothly but after applying the final coat of oil based enamel paint I noticed tiny bumps and rough spots on the surface. The paint I used was a leftover from about 8 years ago. Is it safe to wet sand then finish to smooth out those imperfections without damaging the paint layer? Would appreciate any tips!