Agree that the red looks awesome. The more clear top coats you add it will soak into the grain pores that you can still see.

Most guitar forums seem to recommend light steel wool use between coats and I did exactly that on 1st & 2nd builds and they were the ones where I had the most finish related dramas, all due to steel wool causing more harm whilst the finish was still green. Reverted to wet sanding instead and problem solved no matter how fresh the last coat was, however best to leave things for a minimum 24 hours or 48 hours in the midst of winter over here.

The trick seems to be light and delicate sanding every couple of coats, even if just to give it some tooth for the next coat to grab onto.