Don't think it's possible. The original has a process to keep it looking the same over time.
The only way I have found to keep it looking good is to use an encaustic solution that ages the metal. Don't think I would want to do that on a frame.
I used to do this to Tl1000 stock mufflers. Works like magic.
Anodizing is much different than painting or powder coating. It's a conversion process that integrally affects the substrate. The aluminum surface is being converted to aluminum oxide by the process. The combination of the existing mechanical finish of the aluminum and the thickness of the anodized layer will affect the aesthetics of the part. This is more art than science and good communucation with an experienced metal finisher will be required to get the result you are looking for.
Work has been crushing me lately, but I hope to get around to this myself sooner than later.