[sdiy] DIY soldermask coating?

[Harry Bissell]

I don't know about a 'soldermask' coating (capable of taking
high temperatures) but you could populate the connectors, mask them
with tape, and spray a clear acrylic coating (Kryolon) over the
exposed traces. It would prevent tarnishing and provide ~some~ mechanical protection.
You can scrape it off, or use a solvent for rework...

H^) harry


----- Original Message -----
From: Dave Kendall <davekendall at ntlworld.com>
To: sdiy DIY <synth-diy at dropmix.xs4all.nl>
Sent: Thu, 02 Sep 2010 10:14:58 -0400 (EDT)
Subject: [sdiy] DIY soldermask coating?

Hi All.

I've got some long single-sided PCBs I got from the downsizing 
maintenence dept. of a audio visual studio. (Someone suggested they 
might be spare buss bars for an old mixer).  Each has 4 long copper 
traces with several sets of holes spaced across the 4 traces at 0.156 
intervals ( just like MOTM-format power connections). I plan to use 
them as ±15V power distribution boards, but would like to be able to 
insulate the large unused copper areas of the traces, leaving just a 
small area of copper under each hole for soldering pin headers on to.

Anyone know of a relatively tough spray-on, or paint-on electrical 
insulation coating that won't react badly with bare copper? doesn't 
matter if it's opaque or transparent, but it has to do the same job as 
the solder-mask coating on the solder-side of commercial PCBs.

Cheers,
Dave

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-- 
Harry Bissell & Nora Abdullah 4eva