Simon
Here is some info on powder coating:
To powder coat a part the part is:
- sand blasted,
- dipped in a series of degreasing and caustic type solutions,
- given an electrostatic charge,
- then dipped into, or sprayed with a plastic powder,
- baked to melt the powder and bond it to the part.
The finished result is a sealed plastic surface over the part. It is
normally very thin and flexible. However, if you break the plastic surface
and allow moisture to start rusting the part, the plastic can lift and
separate from the part. (As with Alan Richer's Rangie and most bush bars
that I have seen.)
I have had several brit motorcycle frames, swingarms and other bits done
with excellent results. If you have anything done with machined mating
surfaces (close tolerances), or other wearing surfaces, you will need to
either mask the area prior to coating or remove the coating from those areas
before assembling.
As with anything being painted, preparation is crucial. If the part has any
threaded holes, especially blind holes, be sure to screw a long bolt part
way in. This will prevent the powder from messing up your threads. After
coating, use a sharp knife to slice the plastic around the mating edge and
remove the bolt. Works great and keeps a tight bond with the powder.
Hope this info helps.
Regards,
Martin Rothman
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