+1 on CA. I have tried the nail polish and it's too soft even after it's completely dry. And it doesn't penetrate the CF. If you are looking for color, do the CA, then add color with nail polish or other paint.
I found the thin CA to work the best. Just be careful not to apply too much at once otherwise it will run all over the flat part of the chassis.
Xray - ORCA - Avid RC - MaxFX Paint