Hello, I think what I would do is mask off the sponson rods with tape and paper. Then paint the hull as you see fit. I would say that is better than having to worry about damaging your sponson(s). I have personally ruined enough sponson's trying to get everything apart. If it is not wrecked leave the sponsons alone. If needed mask off the whole hull separately and spray the sponson's. Then reverse the process for the other part of the boat, i.e. hull. Just an afterthought!
Edited by happybradboating, 15 February 2018 - 10:58 PM.