I'd like to reuse a PCB in non-intended way and I have to remove the green solder mask to expose the copper traces in 1 x 3 cm area. Is there any safe method to do it without damaging the traces?
I've tried acetone first, then a bunch of other household chemicals, but it is resistant.
Answer
Google "fiberglass brush pencil", once you try that you won't want anything else.
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