Bigpikle

yep - lots more than a grout sponge, but works out about $70 over here!!!!

I do want one of these to try but will have to wait a few weeks until I'm in the US as they are eye-wateringly expensive in Europe

I have read from Yvan (I think) that GPS has more cut than Poli Seal, and hence is best by machine and Poli Seal is the better option if working by hand. I cant remember the source, but also read GPS uses the same abrasives as Opt Finish polish - this may or may not be true?

Maybe I've been doing this all wrong for the last however many years, but I just go over an area as many times as needed to get it clean before I wipe it. As others have said, I use both sides of my sponge and will happily rinse it and go back to the panel again if needed before I start to dry. I dont ever want to see dirt on my drying towels.

great news I have used a similar (in results if not chemistry) product before from Nanolex of Germany, and it did need a little technique to apply, but would dearly love to try this out and report how if handles European conditions