Best way to strip AU from unpopulated boards?

[crip53]

Hey all,
I could use a little input as to how to get all of the pretty yeller stuff off of some unpopulated boards I got.
I'm so use to having to deal with all sorts of junk on the boards, I'm kinda having a brain-freeze trying to figure the best way to get it off...including all of it hiding within ALL of the little and big holes going through the boards.
Most of the boards are your normal average thickness type....a few fiber layers thick...but a couple are actually thick and heavy (like a server board)..though the gold around the holes on them are really big ~

Anyway, I'm including some pics and hope you guys can spread a little knowledge my way.

Thanks in advance
AC

 

[goldsilverpro]

In the old days, cyanide was the best answer. Nowadays, there is no good answer for selective stripping of gold, except maybe expensive iodine or bromine solutions. I think you should use one of Steve's methods. The one he uses for fingers.

 

[Platdigger]

I knew a guy that used cyanide.
I took some boards to him, it did a good job on the exposed gold.

He also had a method of stripping heavy silver plate from copper.
Left the copper bright and shiny. The scrap yard would always want to know how he did this......he wouldn't say.
Randy