The jury is still out on the durability; however, I have @ 500 miles and two washes and everything seems to be going well. Last night was a test for the coating on the heat shields. I was running late and had 90 miles cover in not enough time. I figure I averaged 85-90 mph for 75 of the 90 miles on the highway (I dont normally condone this type of activity, but the potential fall out that could arise, for being late once again, was worth the risk.). It was just getting dark and I noticed the red glow of the exhaust headers behind the sheilds. I began to wonder if this was just an optional night light I did not realize was offered by triumph. Once I got home, I checked to see if there was any powder coating left at all and to my amazement everything seemed to be OK. If I run into any problems, I will be sure to keep this forum advised.
As for the plastic parts, I actually sanded off the "chrome" finish then cleaned with mineral spirits before spraying w/ Krylon plastic primer. I finished with a black textured spray paint.