if truly doing 1 step (as in polishing and protecting at same time) I typically go with poorboys polish with sealant which was mentioned earlier. LC white pad usually. Not afraid to leave that as the only protection. but if things go quick or if i'm feeling good I'll top with something like 845
I like XMT360 also. But I find myself using that more with marine work and less with cars. Does offer some correction though.
if doing 1 step of polishing followed by a dedicated LSP I usually choose M205 or SSR2. Pad choice kinda depends on the paint. Choice in polish kinda depends on the conditions
What is the "cure" time for the poorboys to apply an LSP?