Are there any FAA requirements for what placards can be made of? I.e. For panel upgrades, like wood overlays, metals panels, etc., do you have to have a specific process for engraving / labeling / decaling or is it good enough that they are there and readable? I've seen quite a few panels where the placards are either totally worn or hardly readable.

Thanks!

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Chuck Rinker
N4532W - '76 112TC
NuMedia Productions