Something I want to add for those that are thinking of doing this but are not quite convinced yet;
Although the prep is the hardest, even that is still not that difficult. I scrubbed my entire coach, cab included, with the Bar Keeper's Friend and a white 3M scrubbie, but it wasn't something that was back-breaking labor. The BKF & white scrubbie actually made the removal of stains, oxidation, and chalkiness quite easy.
It was nowhere near as difficult or labor intensive as any of the many times I tried to wax, or polish, or buff, or any other of the many techniques & products that I tried over the years; none of which gave anything other than so-so results.