Since buying the new HD DA polisher, I have been killing both backing plates and microfiber pads with it. The machine is so fast and rotates the pad/backing plate so fast that it generates a lot of heat and quickly separates the MF discs and burns the backing plates up too. I have set the machine to speed setting #5 and placed a piece of electrical tape over the speed dial to hold it at that speed. Here are a few photos of some of the carnage that this polisher has been creating in my shop.
Lately as Barry has his trusty sidekick "Scott" stopping in at my shop on a weekly basis, I've been buying more of these Ultrafiber discs with the school of thought that I'll polish a work section then pull the pad off and replace with a new pad. I've been running the new pad while the first pad I had been using cools off. After the next section is worked I pull that pad and replace it with the first pad that has been cooling off. This is working pretty good but I really have to be mindful of how much pressure I apply to the backing plate/pad combo cause they still get a bit hot if I'm pushing things too hard "As I do all the time"..
This past Friday I was at a customer appreciation day picnic at a local auto paint supply store where I saw a clearance rack with a bunch of 3M items extremely discounted. I snatched up a bunch of stuff that I saw as extremely useful. Here's a photo. Pay particular attention to the six 5" DA backing plates. I'll explain where this is going, I promise...
It seems that 3M has discontinued this backing plate so I'm glad I was there to buy all 6 of them for $5 each. The other day I did an AIO polishing on a Toyota Highlander using Duragloss 501 with the HD polisher, these discontinued 3M backing plates and the Ultrafiber pads. I was pressed for time, so of course I was pushing pretty hard to get the job done on time, and again found myself pushing my equipment to the limit. I was really applying lots of pressure for a few section passes and then lightening up on the pressure for the last few section passes. After each work section (where I would normally pull the pad and exchange it for a cooled off pad) I checked the Ultrafiber pad for heat and there was none at all..
I then brushed the pad clean and blew it out with compressed air, added more product and went back in to press onward with the AIO paint polishing. I pressed hard on the polisher in every work section I did on the entire car and not once did the pad heat up while being used with this backing plate. I have solved the overheating/separation issue by using a backing plate with holes in it to keep the MF discs cool!! Now to get past the fact that this particular backing plate has been discontinued...
It seems that Kevin "BuffDaddy" Brown offers a few DA backing plates with holes in them that may aid in cooling these pads well, however they seem to be 5 3/4" (Meguiars) of 5 13/16" (Mirka) Perhaps Kevin can get a hold of some actual 5" plates with holes in them. Either that or go with 6" Ultrafiber pads.
Just some recent thoughts and observations. It's nice to have found a solution for something that has been frustrating me and costing me money.
I hope this helps someone here. TD