I think I would agree that sometimes these stickers do etch clear coat And a Glass. I did one car a few years ago. Neighbor wanted sticker off rear passenger window. Sticker came off easy but under sticker was the etching of the sticker design. He even tried a razor blade.
Have you tried a Makita 18v blower? Heard of some detailers here in Hawaii using this it has a rubber nose so not to harm surfaces. I think on High it lasts like 20 min. With NiCads with Li ones longer. I've used a leaf blower myself sometimes.
Sometimes they say those things so they can bring somebody else to do detailing. I heard this once that they jacked up the liability ins req to 2 million per occurance from 1 mill next thing you know they have someone else detailng where you once was that's kinda messed up I think
Different clay color among mfg co differ. Megs has a pro line with red for agressive blue forb fine then the I guess the consumer line white. Then there is another line that has purple and gray another yellow.
yes it gets pretty hot in the car trunks. I personally put my stuff into a good insulated cooler. Hadn't any problems. So if not going to use just take cooler out.