Man what fun! I got the BB EO sampler and the Earthtone and Metallic Mica sampler. Learning pretty quick that micas may not be the best for CP but they still look good. I'm making 1# batches with this recipe - OO 7oz, PO 4oz, CO 4oz and Castor 1oz.
I mixed the mica with the castor and added at trace.
My first experiment was Orange Valencia EO and Gold Mica. I add the scent at trace then split the batter and added half to castor and mica to make a swirl. It looks like a dreamcicle. So far so good. I am just using a whole sample of EO, .5 oz and a whole mica sample (for now).
Second was Tea Tree and patina green. I just mixed the EO, color and castor together and added at trace. Great googliemooglies it's ugly

but I'll know next time not to use the whole pack on dark colors of mica! It's dark grey but smells great so I'll use it.
Anyway, I'm gonna keep on doing this and I'll post as I go.
Please give me any insight you might have, there's no sense in reinventing the wheel!!