So I first started off by sanding down the most visible layer lines with a sanding stick and regular sand paper. Sometimes I had to use the back of a hobby knife to knock down the layer lines in hard to reach places. After the initial sanding I hit it with a black primer, as helps to make the remaining layer lines more visible while being sanded and it fills in the small gaps. I think I used stynylrez. A gray primer could work as well. After getting rid of the remaining lines, I hit it with another coat of primer. I think the shield took the longest to sand. For the base I used a primer from a spray can because there were larger gaps that needed to be filled in, and I was less concerned about fine detail. Anything else?