quintodam

I’m actually an accordion maker. I hope that doesn’t put any potential answerers off. I recently finished a few boxes with raw linseed oil and let it dry for a few days. I then sprayed on 1 coat of cellulose sanding sealer mixed 50/50 with thinners. Then I finished with 3 coats of 2 part precatalyzed lacquer with some retarder added in nice warm weather. After 3rd coat the deep grain showed up white. Have no idea what part of preocess may have caused it. Any help appreciated.