I use a Cyclo machine with an encap product.
http://www.cyclotoolmakers.com/polishers.phpPre-vacuum before spraying solution.
After cleaning, I also vac; up the "extras" that have been dislodged.
Prior to the Cyclo, I was using my "Lil Mak", a Makita variable speed polisher with bonnet attached, then sometimes extracting with my spotting machine after.
Whilst this gave reasonable results, it was still "not quite" good enough for me.
The Lil Mak is very quiet whereas the Cyclo is noisier with a rattly sound. But it does the job superbly.
Shorty down under.