If you have to have a powdercoat finish, do it to a different bike.
I would invest some energy and materials into just reviving the original finish.
Powdercoat will diffuse details, it is just the nature of the material, and multiple coats which is useful for protection, just do it more. Every powdercoat bike I have stripped has had hidden corrosionor visible rust under the powder, now they all looked like single stage jobs. I spoke to a reputable powdercoater for a job I had where we were coating aluminum, and he admitted that there can be microscopic bubbles in the coat, really depends on the oven guy it seems.