"Jim Thompson" wrote
in message ...
On Sun, 1 Jul 2012 20:07:05 -0400, "Martin Riddle"
wrote:


"Jim Thompson"
wrote
in message ...
Hacking a Park-Zone POS to make it work accurately, I find the PCB
has
a relatively thick clear coating.

What's the best way to remove the coating without damaging
components?

Thanks!

...Jim Thompson

I've used lacquer thinner with success on the red conformal coating.
The
only thing is that it will attack some plastics and wipe the numbers
off
of glass diodes.

Cheers


Coating is clear. Looks like it was just poured over areas with
semiconductors.

...Jim Thompson

It may be Humiseal http://www.humiseal.com/
But there are others, and they come in different chemistries, Acrylic,
Polyurethane, Silicone, UV cure

Try Acetone or Lacquer thinner in a corner and see if it softens it up.
Hopefully it's not the UV cure.

Cheers