Harmonic Dampener questions

1sr Harmonic Dampener in questionis an older Summit Racing one but was sold as well by the company that made them.
Made in Australia says Summit has marked,at TDC and about what a timing tape would be plus every 90 degrees.
How good are these? Stock, average, real good?
I had it a long time unused, but clear was yellow, so stripped it.
Plan was shoot a light coat of black and light sand it to leave just black in laser etched area and clear.
So it could be seen easy with my old eyes.
Or can it be powder coated that way?
Will the heat kill the rubber?
Maybe Leana who does powder coat can?
Might have her name wrong formally New Orleans (My Area) but moved to Tenn after Katrina Phoenix Coating?

2nd one
TCI Rattler.
Anyone run one?
Has all this stuff inside that rattles and finds its place to dampen
The good, the bad the ugly?

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