Making paint scratches?

[madmenno]

Hi, I am making a low poly gun. But i am strugling with some stuff.

I made a metalic texture. noise->despeckle->sponge 1,1,0. Then i made some blue paint on it. I made that screen mode so it shines trough so you still see the effect of the base metal layer. Now i have a device on it that scratches a bit over the metal and the paint. How can i make this? Any hints with what kinda tools to use plz.

Thnx

http://home.quicknet.nl/qn/prive/gouwm/temp.jpg
http://home.quicknet.nl/qn/prive/gouwm/temp1.jpg

[Brent]

guess you could make a mask layer with scratched areas....
and where the scratches are the base metal will show through....

[madmenno]

Hmm dunno how masks work, any good tutorials for it? Is it like alpha channels? I done a bit of work, not realy pleased but it's ok i guess.

[Pivo]

u use photoshop right?!
then check http://www.good-tutorials.com/