Shielding again?

[zener]

Alas ! I was able to find a source of cheap metal boxes, probably made of aluminum. They are actually coated/painted with black from inside out.

Do I have to shield the inside of it with aluminum tape because it is coated/painted already?

Thanks.

Zener

[Paul Perry (Frostwave)]

If it is a metal box, it is shielded enough, whether or not it is painted.

[gez]

Just to add to what Paul said, if the paint isn't conductive (highly likely) you'll need to sand away a tiny bit for a ground connection. Either that or make sure the jacks make contact with some bare metal.