I think you can. IPA solutions are fairly easy to mix and effective. However, you have to be careful about the wiping such that you don't scuff the paint (not an issue with trim). Some will argue synergy: stay within a brand. I don't find any merit in that unless someone can explain to me (chemically) why a certain product helps the final product bond. I use Gtechniq Panel Wipe or mineral spirits for a lot of polish removal, and they both work fine (i.e., I've enjoyed product-advertised longevity out of coatings applied thereafter).