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NOPE. it's carbon
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Posted 11/4/2023 11:01 (#10468494)
Subject: NOPE. it's carbon

East central Iowa

The thing I don't feel it was understood is this isn't a stain.  It's pure carbon.  When you burn a glob of apple juice and sugar in a 375° oven for a time it becomes carbon.

I tried boiling water and salt with dish washing detergent, that made a nice clean black 1/8" thick black blob.  I tried a heavy brush and that removed any surface material that was loose.  Then I tried 100 grit sandpaper with a lot of energy and force, that got rid of a lot of it and the coating on the cookie sheet.

I'm going to leave it set for a bit with soap, water and salt on it.  Then I'm taking it to the shop and hitting it with a ¼" sheet sander.  I will do then entire sheet and make it all nice and shiny ( I hope). 

If I still had some carbon tetrachloride I know it would have removed it.  I don't see spark plug cleaner anymore and the stuff, if it existed today probably wouldn't clean my fingernails.  

I appreciate responses to questions and I know they are well intentioned, America is full of helpful people and many are here.

Not everything I try works either, but I keep on trying.  Thank you.

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