Hi all,

For the project I mentioned in my other post, I'm considering making
my own enclosure. I've become a bit better with that sort of simple
mechanical design, and it would allow me to build in guards to prevent
unwanted switch presses and protect cables and connectors a bit. This
isn't anything really complex, just a bit more than a standard
rectangular case.

If I go this way, I'll have to use some sort of easily machinable
material, such as nylon, delrin, or some kind of HDPE. No problems
there, but since this device will be used with a radio nearby, I think
it should be shielded to help prevent interference. As a result, I'm
looking for ideas on how to shield the inside of a plastic enclosure.
I have found a couple of sprays that are available locally, but I'm
not sure which is more suited to my application.

The first is MG Chemicals 838
http://www.mgchemicals.com/products/protective-coatings/emi-rfi-shielding/t=
otal-ground-carbon-conductive-coating-838/
This appears to be a carbon spray designed for shielding and creating
conductive ESD free surfaces.

The second is MG Chemicals 841
http://www.mgchemicals.com/products/protective-coatings/emi-rfi-shielding/s=
uper-shield-nickel-841/
This is a spray with nickel in it.

I think the nickel spray would be better, but I'm not entirely sure.
I'm also not sure how well either of those would stick to the plastics
I'm looking at. Another option might be to try to adhere some aluminum
foil to the inside surfaces of the enclosure.

Any thoughts on which might be the more appropriate path to take?
Alternative ideas are definitely welcome!

Thank you!

Josh
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