The Flex offers more power but won't burn through, or abrade through the paint unless you use bad technique and your car's paint is already thin to start with, like some other caveman detailers recklessly detailed it using to abrasive of product before you took possession of it.
Wolfgang Total Swirl Remover is a Medium Cut Polish, for most people and most cars across the world, it offers more than enough cut with the right pad, tool and technique to remove the majority of swirls and scratches. Anything it doesn't remove would probably be deep enough that if the car is a daily driver then it's better to live with the defects then remove so much paint off the surrounding areas to actually remove the deeper defects.
Yes, dial goes from 1-6, what the OPM's are doesn't matter because in reality, like the PC you're going to use the
- 5-6 to remove defects
- 4-5 to polish to a high gloss
- 3-4 to machine apply a wax or paint sealant
You don't need to know what the OPM's are because at the end of the day you're always going to use one of the above settings on the tool for the task at hand.
Like Ron aka rsurfer pointed out, because of it's direct drive design, if you hold the tool with more pressure to one edge of the buffing pad it will feel like the tool is trying to "walk" away from you, toward you or side to side, (depending upon where the pressure is applied), what this does is TEACHES you to hold the pad flat. Thus the tool is what I call self-teaching.
Smaller pads are easier to control than larger pads but all pads are controllable as long as you hold the pads flat to the surface.
