Paul has it pretty straight on the rotary, practice on a junk hood or something. Mike did say that he wouldn't use the high speed rotary on my car - "never put a high speed rotary on a car that doesn't need it" were his words, I believe. For its intended use - maintaining a good finish - he said that the Porter Cable was fine (He used one in applying and removing wax on several cars).

Bottom line: The high speed rotary does heavy work, but work means removing paint/clearcoat, as scratch removal means grinding the paint 'plains' on each side of the scratch down to the level of the scratch valley floor. Surface temp of the hood measured over 40 degrees warmer than surrounding areas on one car while removing scratches. The PC does much less work/paint removal, but really makes polish or wax application a lot more easy and less time consuming.

__________________
John

2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)

Click to see 87 300E