GCp controller problems

[NesMario]

Hi


Today I want started with my GCp but how I do it with the controller. I've already looked at all the possibilities and
got me to where I decided to split the controller.
Now I have the following porblem: the inner body of the controller looks (down) . As you can see the surface is covered up (the white) How can i Solder it?

[Harshboy]

If you look closely you can see the traces underneath the white paint. Just scratch the paint off to reveal the copper to solder to.

[mako321]

according to my multimeter, that stuff is somehow conductive also as in me: can solder to that stuff. (or was that on my snes controller?)

[Joes2Silly]

just take a xacto knife and scrape away the paint until you get to the copper traces