Engine rat poison > fiber discs

Just in case ya didn't know this taboo that eats engines like sodium fluoride does blood vessels.

http://www.enginebuildermag.com/Article ... epair.aspx

Yep; as much as practical, cutting, grinding, blasting happens outside.

I admit, however, to the occasional use of a long mill file or a large flat whetstone to identify and subdue high spots, taking care to avoid knocking down the outside edges.

Thanks for the heads up hobit. I didn't know.

Chuck

Yes sir Brit Iron mechanics have made me aware not to use steel Brillo pads or abrasives to embed in soft Al and to beware even wire brushes d/t bristle getting lose. I'm a file and razor blade to finger nail guy now. i like cleaning up Hylomar better than anything else as basically just rubs off. Worse are the old fashioned stuff that turns hard as road tar.