You can also get films that you can laminate onto the board. That is what I have been using. Never tried spray-on though as I can't get any easily.
--- In Homebrew_PCBs@yahoogroups.com, "Zoran A. Scepanovic" <zastos@...> wrote:
>
> On 09/02/2012 12:08 AM, Kevin Byrne wrote:
> > A question for you chemical experts out there: If this question is not off topic: if it is let me know and I will stop.
> > I have a large amount of copper clad boards with no positive or negative devolopement solution on them. Is there
> > a chem. that I can brush or spray onto these boards to turn them into boards ready for positive or negative developement type boards?
> >
>
>
> Kontaktchemie: Positiv 20 (spray)
> Cinkarna Celje: P-501 (1 l bottle for various ways of application)
>
> --
> Best Regards,
> Q Systems
> Zoran A. Å ÄepanoviÄ
> http://zastos.com
> +381 63 609-993
>
> -..-
> S∗∗t happens. When you solve s∗∗t, it mutates.
> S∗∗t never goes away. Entropy IS s∗∗t.
> Depend on it.
>