I’m in a fairly same position. I have an ash strat body I didn’t grain fill enough. After spraying nitro the grain texture is still there (originally I wanted it smooth) I’m not sure how to get the orange peel out as I’m scared of dust from sanding and/or cutting compound getting into the grain and not being able to get rid of it. I did spray one flash coat to see if I can get away without sanding but it didn’t have much affect