I have lots of hours with Lake Country Purple Foam Wool Pads on 3 Jet Black BMW`s, 1 Jet Black Lexus, 1 Jet Black Honda Civic Farm Car, and a couple of Airplanes with that harder than steel, dirty nasty, Urethane Airplane Paint.. And of course, several other vehicles that were not Jet Black..
Nothing better for knocking down extreme paint defects quickly, and if used carefully, leave a pretty darn good result that does not require several more stages to bring to LSP ready..
Of course, only used a Makita rotary.. The Products used on all the above was Meguiars 105, and then Meguiars 205..
These pads will blow off a little wool at the beginning and then will settle down and cut very fast on a Rotary, perhaps not so fast on all other machines, I don`t know..
I read you already learned about what happens if you go too long or too hard, or the paint is really thin, weak, etc., dozens of variables come into play here..
That Spur tool is used to clean out the wool at the highest speed, which on a Makita is 3,000rpm... Perfect.... Just run the tool up and down the pad surface while its spinning..
Eventually the pad will wear down, flatten out, and will not correct as well, so you have to just toss them.. They have done their job...And done it well...
For the Correction and Polishing stages, I tend to use lower speeds, so I have more time to lift off the panel, and see how its going, before I get into trouble..
The other thing that has helped me immensely, was to purchase a Total Paint Thickness Meter, so I can get a baseline measurement, do the work, measure again, and see what changed, along with lots of eyeballing it..
Dan F