Hi guys.

I have a 2009 Dyna FXDB with the grey coated engine and casings.
This winter, i forgot to spray protectant on the bike before garaging it up for the winter, and now i have a kinda egg-shell black mottling/corrosion on the primary casing.
Does anyone have any tips/tricks for removing this corrosion?
It obviously wont come off during regular washing, and hasn't shifted with proper S100 style gel-cleaners. I'm thinking that perhaps it won't come off unless i use something that is more reactive?

Any help appreciated.

All the best...

Richie.

 

Can you post a pic? Are you sure it is painted or is it raw aluminum with a clear coat?

I want to know exactly what the finish is before recommending something, but polishing compound come to mind....but again, not 100% sure what the surface is. YD

 

Had this problem with my gray motor. The finish was neglected from the last owner like it was never cleaned. I used it all, Simple green, s100, scotch brite and wd-40 nothing worked.

I ended up removing the motor to PC the frame and just painted it with VHT wrinkle paint. its been like this for a year plus now and the finish still looks great. If you resort to painting it just make sure you prep good. Remove all dirt, grime, oil and grease.