Could anyone help with my paint choices? I always prime with red oxide if hand painting (free from work), but I’ve hit a problem spraying over it. For some reason I decided to spray a high build rattle can primer over the red oxide, but it reacted. Should I avoid RO in the future (rather not!) or what spray paints go over it without reaction? Never had an issue painting over it in the past. It’s a job for the missus, so way more important than normal!