[TiDuc]

Scoth brite pads.
They rust because there's iron in those pipes, there's grades of purity, some have more iron than others and some are 100% stainless but that would make them more expensive.....:think:
Here's Termi for ya!
You won't see that happen (or I never did should I say) on Arrows and LV

Yeah, cause Termi's are cheap????...... Sorry I just could not help myself

But yep, your right the quality of material makes a huge difference. I built a stainless fuel system for a yacht, and they insisted on buying the stainless tubing from India, (cause the tubing was way cheaper) and the finish and workability of the same grade (316L) of stainless was night and day when compared to 316L from another source. Had a guy spending literally weeks on finish work because the material was so crappy!

 

[TiDuc]

Make sure you check carefully with the companies you contact, not all are totally honest about the temperatures their coatings can sustain . Powder coating in general is not sufficient for coating headers, it burns off eventually. It's just not rated for that kind of heat. There are other coatings, Jet Hot or Cerma-chrome etc that will do the trick

 

[TiDuc]

There seems to be a few powder coat companies here in Kuala Lumpur...I'll take a trip next week and visit a few.
Good though I think I am at many things...colour co-ordination is not one of my best things...so I guess it will be boring black....then the difficult decisison...matte or gloss! (So hard!!). Nick

They make coatings that have the same finish as brushed stainless. Cerma-Chrome is the one I have used on 2 sets of headers with excellent results over years of use. One on a Fireblade and another on an injected big block chrysler...