Great question, since they are made with lambswool and foam I personally don't recommend using any hot water on foamed wool pads.
-I uses 1z blitz APC @ 30:1 and spray the face of the pad
-Then I rub the pad against a washboard creating a sudsy lather (you could also just use your thumbs)
-I then use a garden hose on the fan setting (cold water) to rinse out all of the APC
-Lastly, I wring the pad out and use compressed to blow out as much water as possible and fluff the fibers back up prior to laying face down on a rack to dry. I would think the tornador gun would also be effective at fluffing the fibers back up?
This is the best blow gun I've found for blowing out foam and microfiber pads. It's a more concentrated stream and the trigger makes it easy to control the air pressure. When you compare it's performance to any of the cheap blow guns you can buy at home depot or walmart you'll wonder why you didn't buy one sooner!
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This is the type of air tool I use for wool pads, lambswool, and foamed wool. When blowing compound and paint residue out of wool pads you do not want a blow gun that has a tight stream like the one above. I prefer a blow gun that provides a wider cone for foam/hybrid wool pads because this stream pattern is better at fluffing the fibers vs matting them down.
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