So, you have a
UDM. If you do not have lots of experience with polishing, I would use polishes more geared for UDM /RO type polishers and pads. 106FF/FA and 85RD are great polishes but work best with rotary, however, with time and experience, they work just as well with a UDM/RO polisher, just takes more time. That's why I suggest most RO users to use a polish more suited to that type of polisher. Once they gain more experience, they change to more esoteric polishes or ones made for rotary use.
Don't forget 3M Ultrafina does well in finishing.
Pads, Start with an Orange pad, get a Green pad, then full polish and finish pads.
With the UDM, you'll have to take your time to do any real correcting, but if the finish is good with very light marring, you'll do fine. It's matching the pads/polish to the finish you have to correct, or finish. Always start mild and work up. This goes to both pads and polishes.
With a good pad and finish polish, you'll get that finish blinding glossy. From there, go to your LSP.
I use 106FF/FA and 85RD often, but I use a rotary mostly. These are good polishes, but if you choose to seal as opposed to wax, make sure you wipe down the finish with an IPA or wash to strip the lube oils from any polishes used prior to sealants. If using a wax, go right to the wax.
Deanski