Homebrew PCBs

> Any practical idea/results/cost here?
> Cristian

I have used a cheap infra-red, I can use to melt most any thin black 
material, lines so thin you need a 10x lens to see them.  With a cnc, I 
can rasotize an image with it.  A co-2 laser is LOTS more powerful and 
really expensive, not something someone can buy to toy around with 
(unless you have $300 - $1,200 ebay prices to throw around).

The IR laser diodes are strong enough to melt, smolder thin black 
materials.  I can etch a logo in black plastic within a square 1/4 inch!

I just cant figure out what to use to melt or solidify as a resist onto 
a copper board.  Spray paint is a new idea, if I can manage to find a 
paint that is thin enough that will vaporize with the diode I am 
using.  And also thought about using printer toner (just the black 
powder) - to somehow coat the entire board, the IR diode could also 
melt and fuse the toner right to the copper, but that stuff is very 
messy!