Originally Posted by BAK04GT
i would use a bonding primer with a flex additive......see your local dupont dealer...he ll take care of you...the right primer and flex is the key
There is nothing special needed here. Any brand-name automotive catalysed (and it MUST be catalysed) primer will be fine. A flexurizer is not needed. What IS needed is immaculate preparation to ensude proper bonding.
I just painted the fairing on my K100RT a few months ago. I used PPG "Prima K36" primer, "K201" catalyst and the appropriate reducer. The stuff is beautiful to work with... hardens in a half hour and sands like a dream. Doesn't even clog 600-grit paper.
After that I used Glasurit "55-line" color coat and their clearcoat. Other brands of paint are OK too, but the good thing about Glasurit is that they are BMW's OEM suplier, and THEY invented the color formula. All the others may be close, however.
By the way, here's a tip. The primer MUST be final-sanded with 600 paper until it is a smooth as a baby's ...well you know. The problems tend to be the edges where it is hard to get a smooth radius around the edge. The trick is to use green ScotchBrite. This results in a beautifully smooth edge and takes out sanding imperfections.
Remember... the final color coat hides NOTHING! IT actually EMPHASIZES the flaws you can hardly see in the primer!
One more thing. Never use lacquer-based (non-catalysed) glazing putty to eliminate small imperfections before priming. Use ONLY catalysed glazing putty.