Homebrew PCBs

Adam Seychell wrote:
> 
> I've recently bought a few old PVC mixing tanks that were
> each fitted with nice little magnetic drive pumps
> (10L/minute). I'm wondering about converting one of them to
> a spray etcher. I know these pumps can be expensive new and
> is one reason why simple bubble assisted immersion etching
> is common for hobbyists. Has anyone here built a spray
> etcher or know of any links ?
> 
> The plumping can be done with common PVC pipe and fittings
> and I've checked the cone shaped spray nozzles are available
> from industrial suppliers. However I've have no experience
> with spray equipment. I'm guessing it will be a trial and
> error design.

Just use the outlet thing from a plastic watering can (the
type that's about 10-15cm diameter with hundreds of holes).
*Any* kind of spray application of the etchant will make
the process faster.