I get the pipes hot until the stuff on them melts.
Then I wipe with a towel being careful to make quick wipes and turn the towel to it's opposite side each wipe. The goal is to get all the stuff off except a very fine film.
Then let the pipes cool.
After cooled, take fine steel wool and gently remove the residue.
Works for me. And fine steel wool doesn't scratch the chrome of the shields.
2008 Road Glide
Phoenix Customs Bagger Brace
CP flat tops
R&R Stage 3 heads, .030 gasket, 82cc chambers
Trued, welded, and balanced crank by Hyperformance
TMan 590 cams
HPI 54mm TB
Supermeg with open cap and 15 discs
TTS tune by BVBob
2003 Indian Scout Deluxe
Aspen White (got it for my wife)
S&S "SuperStock" 88"