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Finned exhaust clamps cleaning up & replating?

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theriddler:
Hi does anyone have any suggestions on how to rejuvenate the finned exhaust clamps? I can get them clean but would then like to get them treated as they seem to be prone to rusting?

AshimotoK0:
You have to remove every trace of chrome/nickel plating by reverse plating in the chroming bath. Then  media blast them, then clean up with a rotary wire brush.

Well that's what two chromers I have used both  told me anyway. Very difficult items to chrome and even originals tend to spot rust very easily.

RGP750:
The fins were designed originally to be rough as this increases surface area and
 causes turbulence over the surface to dissipate heat.
Back in the 70's when it was 'cool' to polish the fins on heads and barrels bikes frequently seized as they ran too hot .
Yes they don't seen to last very long when replated .

kevski:
You would be better off sourcing new ones, this would be a cheaper option, they would still end up rusting quite quickly though as the fins shield the recesses during plating and the underlying nickel remains very thin and chrome is not waterproof.

AshimotoK0:

--- Quote from: kevski on September 24, 2018, 10:38:01 AM ---You would be better off sourcing new ones, this would be a cheaper option, they would still end up rusting quite quickly though as the fins shield the recesses during plating and the underlying nickel remains very thin and chrome is not waterproof.

--- End quote ---

Agree ..it's about fifty quid to get a set of 4 re-chromed.

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