If you order the
Sonus pad kit you’ll get a 5” backing plate that will also work fine with the 6/6.5” LC pads, it will also give you a starter set of pads. From there you can order additional Sonus pads or try some LC or Meg’s pads. The pad I use the most is a polishing pad, of which I have several.
Start out with the lest aggressive pad/product combo and then step up if needed. For example here is where I might start: #80 on a polish pad, then step up to #83 on a polish pad, then step up to #83 on a light cutting or cutting pad. I personally wouldn’t use #83 on the blue pad because it is made for lighter polishes, not saying you couldn’t, just that I wouldn’t start there if I felt a need for something as aggressive as #83.
Although I have some terry and MF bonnets I haven’t felt a need to use the terry, I have used the MF bonnets for buffing off LSP’s.
Rotary…….. haven’t tried any of my PC pads on the rotary yet. The rotary will produce more heat, but perhaps less stress (on the Velcro) than the RO action of the PC. Either try some and see how they hold up or ask the manufacturer about that. Since my 4” pads from CMA look like LC pads, and they sell a 3.5” adapter to use them with a rotary….. well you can draw your own conclusions.
Get a 3.5” backing plate for the 4” pads, and if you want to use them on a rotary get a 3.5” backing plate made for the rotary:
http://www.properautocare.com/4inspotreppa.html
The subject of pads has also been covered quite extensively here, so a search should turn up quite a bit of information.