Mirror, anodised, foil-backed guards.. can affect sound?

[NickHorne]

Who can hear a top-end change with metallic pickguard materials?
I remember a very lucid Bill Lawrence essay on eddy currents / Tele bridge materials / screening / hum / top end response from pups.
If the mirror guard on my WR is doing any upper-mid sweetening, then I like it (but surely the metallic thickness of a sheet of mirror acrylic must be very small)....
Lawrence's view was that Fender's original aluminum backing to Strat guards did do some "sweetening". I had an old P-bass once that was built like that, and it was certainly mellow; I put it down to old alnico at the time, but maybe that wasn't it.
Bill L reckoned aluminum does something that copper, for example, doesn't do so much.

[jonc]

Some good info and great products from one of our very own:

http://www.tone-guard.com/

[http://www.tone-guard.com/Metal%20Pickg ... _Info.html

[NickHorne]

Thanks!
Pretty much confirms what I remember of Bill L's info on the subject. Interesting.
Best,
Nick