That air grinder may be spinning a bit too fast to get compound to load properly. The friction between the wheel and the compound melts the compound and deposits it on the wheel. If the surface of the wheel is going too fast, the compound may just fly off from centrifugal force.
You might try "pulsing" the grinder on and off as you apply compound. It would be a very good idea to read the online "manual" to get an idea of what you're up against. Once you get the wheels loaded, practice, practice, and patience will be your best method of obtaining good results.
Prep is key to a mirror-like shine.. Some parts you can hit immediately with the buffer - some you'll need to sand to remove imperfections and get smooth.
I sand parts up to 400 grit (Sometimes to 600) until they're as smooth and scratch free as I can make them. Only then do I begin to polish. I spend about 75% of my time on a part sanding. Only about 15% of my time is spent actually polishing. The last 10% is cleaning between steps, changing wheels/tools etc.
Good luck!
|