I hadn't even thought about the paint before I started building. I should have painted the black tubes first. If I had it to do over again I would have. So, I was forced to mask. It wasn't nearly as bad as I thought it was going to be, but just time consuming. Plus, it was good practice for the Saturn 1B that I still have yet to build. I want to leave the paint for last on that one, so I can fill or fillet any gaps that may be present where the lower shroud meets the tanks..