I am working on some drums and I am using a satin nitro lacquer. I want a thinner finish so I tried 3 or 4 coats then sanded it flat. I still had some slight indentations from the grain on the hickory and I didn't want to sand any further because I thought I was close to going through so I sprayed another 3 or so coats on it. When I looked at it after those next coats the grain indentations where much larger than they were before the 2nd round of coats. Sooo I sanded it flat again with 400 grit and almost had the grain dents out when I started seeing wood. I just started a 3rd round of coats and the grain dents are move visible again. I am using minwax brushing lacquer and no sealer. Is this because I didn't use sealer?