3M 048011-18730 3M-18730 Roloc Bristle Disc Grade-50, Size-2, Green

can not be wrong when cleaning aluminum service , still make sure use light pressure to do so.

Great tool

Misleading listing as your choices are a 2 or a 4 pack or discs. The impression is a choice of 2 discs or 4 discs when in reality it is one 2 inch disc or a 4 pack or discs (also 2 inch).

Worked great for cleaning engine block during he’d gasket replacement.

Love these things. . I use them mainly for cleaning the mating surfaces of engine cases/ heads etc. Doesnt removed metal just the gaskets.

Along with a carbide scraper, quick for preparing previously painted metal railings and some ornate areas like vines/leaves in flaky ironwork. Time saver, left great surface for priming.

I got the green one which is for iron surface finishing or body work, my words as well as other Techs. White is finer grit (under 200 though) and better for aluminum surfaces. Let me caution you that no matter how safe Techs like myself want to say these are, they sort of arent in some situations. Polishing a blocks cylinder head surface and getting some down debris that you may not be able to see down in the engine...not ok. Some people line things with oil and paper or q tips as I do to plug passages and holes. etc. Water jackets not a huge deal, if you are going to flush it and use an compressed air to clean away debris...yet not perfectly clean inside engine. Many techs will NOT use these on blocks surface. I do. You sort of have to decide for yourself the risk and proper preparation to actually use it on a block. Other places I dont even prep I just buzz (lightly) off the material and enjoy the long lasting bristle disk for about 3 heads or various jobs. I can use the worn down flat part in the end later for rust on the frame or body. So I feel I get good use here, but it is costly. definitely better than 3m roloc fiber disk. Longer life, less hassle.

great surfacing tool

Did not work at all for sanding detail on a table I was refurbishing... not sure what a good application would be.

Non abrasive will not damage softer metals or tile,