Get your TDS (Technical Data Sheet) for each primer, paint etc. The TDS will tell you specific things like how many minutes in between coats. And whether to do thin coats or medium coats and whether to dilute. STICK TO THE TDS. All the professional paints will have TDS. Make them your buddy. Follow their directions.
If you have time got to Sherwin Williams class. I had a lot of fun flying to Wichita and taking the Sherwin Willliams painting class on a weekend. Of 10 students, 8 were building RVs. It was a great little vacation.
Ready for first start