How quickly does bronzing occur?

[JimTT_imp]

I had a stainless Supertrapp 4 into 1 on my '81 CB750F and a number of other stainless exhausts pipes and cleaned them all up with with Scotch Bright pads. It leaves a very clean looking finish; it does not last forever but is not hard to renew. I prefer to finish is a circular motion around the circumference of the pipe; how far down you go is up to you.