This is why I moved to the One Bucket, many cloths method. If not familiar with it you fill a bucket with soap/water and microfiber cloths. Then you grab a cloth, wash 1 panel, then drop the cloth in another bucket, then grab a new wet cloth, repeat. So no contaminates ever go back into the bucket, and nothing moves from 1 panel to the other. I use similar for drying, 1 cloth per panel. Takes me 20 microfiber cloths and 45-60min to fully wash and dry.
I use rinseless washes when I'm short on time. Hopefully you're using a rinseless wash solution like ONR instead of regular soap? Although I have a few bins full of microfiber towels, I find it more efficient to use a wash mitt + a few clean towels to wipe.
I'm using Mequiar's Gold Class. It was recomended by my detailer. As they on the reg do all the detail work for my local Porsche dealer and a bunch of super rare cars (my car was literally sitting next to a 1 of 23 Jag, and a SVJ when I went to pick it up) I figured their advice was worth taking. I'm still rinsing the car, I'm not using the hoseless method.
Yes I reuse them after washing, since they are clean, it doesnt matter what panel they werw last used on, the point is not to drag contaminants from one panel to the other when washing. I use Chemical Guys interior and leather cleaner for my interior.
Any specific type of mirco fiber towel, or any will do as long as they are brand new
I'm pretty sure the car is finished at this point I just need to go pick it up. But that PPF stuff is not cheap