I have had lots of success with 5 minute epoxy as being better than 30 minute epoxy. Glitter glue works great but requires multiple applications over several days. Inlace, the stuff available at CSUSA is really really great. Comes in premix colors and clear where you can buy the powders and mix your own colors. I really like that product, it's the fastest results and does not require a finish over the top, it will simply polish. With epoxy, you will want to give it 24 hrs before turning, with inlace a couple hours is plenty.
Because you are using aluminum, you will want to soak no matter what you put in your holes with thin CA. The slightest crack or crevice in your inlay will become filled with the black slurry of wet sanding the aluminum..that is why you must seal the inlay in with CA...even if you use a PR, seal it before wet sanding the aluminum..can't stress that enough, been there done that!