Removing AL oxide but not plastic material

Posted by admin on June 6th, 2009 at 01:56am

I know one can remove oxide easily and completely, but this has me stumped.

Here is a layer of oxide so thick it’s eaten thru the thin sheet in some places. something’s been reacting on the surface for years. problem is, underneath it is some text from an old plate. it’s printed on in that mauve plastic ink compound used for images onto which is then used for on paper.

you can almost make out the word COFFEE under all the crud.

so: is there any way to remove the crud without damaging the plastic-like compound fused into the ? i’ve tried sodium hydroxide, it wipes out oxide and ink. so does baking soda and Simple Green with light scrubbing. MEK does nothing, neither does denatured alcohol of course. ideas?


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