copy chrome and aluminum problems

[jtagger19]

I'm trying to plate aluminum with a copy chrome kit but I'm having problems
it's coming out of the tank looking like sand paper once I dry it it starts to delaminate
I have tried all kinds of different amp settings and it's still happening
solution is not contaminated because everything else comes out great
(coopper pipes and metal)
the last thing I can think of is the zincate cuz is the only thing aluminum use that others don't .
is there any special way to zincate it ?
I just dip the part and after 2-3 minutes the part stops bubbling and I take it out and plate it.
any ideas

[AresP]

Buff or polish the aluminum surface to a bright shine. Wash with a mild detergent and do not dry. Apply Aluminum Cleaner by dipping or brushing it onto the work-piece. Note this is not an electroplating step.

Rinse with clean water and without delay dip or brush on the Zincate Solution, you should get a light gray coating on the aluminum.

If the coating is not even or has places without color. Cleaning and re-zincating is required. This is not an electroplating step.

To activate/clean the aluminium prior to zincating, some people use diluted lye

Maybe the problem is improperly cleaning/activating your aluminium surface before the zincate step.