On Mon, 26 Mar 2007 11:34:41 -0400, JW wrote:

Hello,

We have a problem with one of our circuit board vendors who applied solder
mask to the gold fingers on a lot of 100 boards. Naturally, the 100 boards
were built up and the problem wasn't discovered until test. Does anyone
know of a way to remove it without losing the gold on the fingers?
Solvent or ??

Mechanical means are going to have an impact on the plating, so (unless the
pulsed-laser trick works) I suspect you're stuck with chemical attack.

Dumb question #1: Seeing your board-fab botched their bit, have you tried
actually asking them WTF the stuff is, and then talking to an industrial
chemist?