There are variations in micarta.
That made with paper or linen probably will not absorb noticeable amounts of what ever.
That made with canvas or burlap will retain some foreign materials unless sealed or soaked with something in my experience. You can apply something like exterior poly urethane or saturate with a light oil such as WD40.
Or you can just flush out the bad stuff with hot water and go on with it.
jmho
Tim
"The significant problems we face cannot be solved at the same level of thinking we were at when we created them."
Albert Einstein
At Khe Sanh a sign read "For those who fight for it, life has a flavor the protected never knew".
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