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... I mean it is acidic?

YUP! In a big way... <img src="/ubbthreads/images/graemlins/ooo.gif" alt="" /> I've been able to etch Stainless Steel down a few mm's a time... <img src="/ubbthreads/images/graemlins/grin.gif" alt="" />

"As you think, so shall you become." ~ Bruce Lee