Hello Jdim, thank you for your questoin. The RYOBI 4 in. - 7 in. Microfiber and Synthetic Fleece Buffing Bonnet Set (2-Piece) is only meant for polishing and buffing, it does not have any sanding capabilities. It could be used on an already finished surface to polish the surface. - Justin
As far as I know, this is the only bonnet that is sold by RYOBI & it will not work on my 6" RYOBI buffer, because it is too big. RYOBI also makes larger variations of this bonnet too. Home Depot sells other bonnets though not made by RYOBI that are quite good. My suggestion is to do a search for polisher bonnets on HomeDepot.com
No! A sander works much differently than a polisher & you are liable to damage the finish of your vehicle.
These can be machine washed or hand washed. But, they may last longer if you hand wash them as opposed to letting your washer tear through them.
I'm not sure why it contains lead, but it's probably just a warning for California residents due to Prop 65. I would think this is something to be alarmed if you were to use these for a living, like if you had your own detailing shop. I bought these for my 6" RYOBI polisher, and they absolutely did NOT fit. I had to buy white bonnets made by Wen that fit so much better.