[gremlin]

Wait until it gets just the right amount of "age" then clear coat it like they do with the old hot rods to preserve the look.

Any need to neutralize (fix) it first ?
How to clean it (prep) for uniform adhesion ? 

[tooseevee]

Any need to neutralize (fix) it first ?
How to clean it (prep) for uniform adhesion ?

            Just be ready to deal with it peeling off down the road. Your prep work has to be top shelf & use the best clearcoat out there (Eastwoods?). Also it's a good idea to bake each piece in the oven at 150F or so for a couple hours. That'll make it last a little longer. And a little luck helps.

             Personally I wouldn't clearcoat the aluminum on a general use motorcycle. A show bike maybe. It's a mess when it starts to peel. If you're gonna rattle can it, get Eastwoods best.   

[Ducati Scotty]

Since it's a small piece and not a whole car AC-50 would probably do just as well to preserve your 'patina'.  Just let it get to where you want it, wash to remove anything on there, then spray.  You'll need to respray once in a bit or after you wash it but that's quick and easy.

Scott

[hillntx]

We use a product called FLITZ that works great.  You can buy it through Amazon, but can probably find it other places as well.

[drbvac]

Autosol - works very well on all metal and not all that abrasive.

[squire]

Autosol - works very well on all metal and not all that abrasive.

+1