In the past I've had problems with paint incompatibility so these days I try to stick with one brand. Rustoleum seems to be good enough and readily available. I've been using their 2X primer and it sands pretty easily, but when I tried to buy more I found that it was replaced with their new "universal primer" that is supposed to stick to anything. But they don't say anything about it being sandable. They have automotive primer which probably is sandable but it doesn't come in white and I prefer white.