Amd Primer

The "right" way is to always take everything down to bare metal!!!!
You can buy a car that a guy just spent $6-8-10,000 on the body/paint... then next day take it to another "shop" for the same body/paint work, and they will every time want to take it bare metal otherwise they will not guarantee the work! Yea I get it.
Makes a difference if I do my worlk for me OR if you are a pro shop workinmg for the public.