Thanks for the responses. I had not thought about the spackling cracking over the open bays. I will have to make a trip to the hobby shop and pick up some nitrate dope if they have any. There are so few people building he doesn’t carry much in the way of building supplies. He does have a nice selection of ARF’s, Cars, and car parts.
The primer I used is Rust-Oleum 2X white primer and plan on using the same brand for my color coats.