Most boxer riders get a little upset about the blue/burned appearance of the header pipes. It is removable, to like new condition, after removing the pipes for better access, with an electric drill powered 4 inch diameter cloth buffing wheel and 2 amazing products called
Blue Away and
Simichrome. Use the Blue Away until the discoloration is completely gone, then use the Simichrome until the mirror finish is there. You can't overdo rubbing it with either product and a very small amount of both products goes a long way. I only used a small portion of each original container for all 3 cleanings.
Here's pictures of the 3 times my OilHead got the treatment:

The 3rd picture's odometer reading says it all.
My F800ST's almost hidden brushed Stainless Steel header pipes are barely discolored from their normal light brushed exotic metal finish at about 22K miles and just plain dirty from baked on rain water spray. They will get their first pipe removal/cleaning/polishing treatment someday . . . .
EDIT: To update to a better, faster photo host.