grease remover

Sure, give it a try.

What exactly is that? Cleaner, an acid, or a base? Metal pretreatment?

Aluminum is often unreliable and unpredictable to bond to. Try a different epoxy as the first coat, don't wait too long after sanding. It's also somewhat susceptible to corrosion when in direct contact with carbon. In aviation aluminum parts are therefore pretreated with certain chemicals before epoxies are applied, not because this enhances bond strength (it sometimes doesn't), but because it becomes more predictable and will last longer.

yes sure man . i do tons of wraps so i know what i say

did you cleaned surface with Nefrase so surface after sanding can be prepare to hold resin? from photos i doubt

Brainfart has been generous enough to share an exceptional blog at http://ocarbon.com/blog/tag/texalium/ which will directly address the method you should use.  it is also a much more professional method that I have been using for skinning, and I will be incorporating his methods into my work.