I've been known to start with a white, gray, or black basecoat and paint up from there - haven't used clear to start with yet. If you are concerned about your painting skills, buy up a bunch of the old POTF "superhero-pose" figs on ebay for 99-cents a pop and practice on them til you like what you see.
Also, you don't *have* to start with the rattlecan. Just wash the fig down real good with a grease-cutting dish-liquid and let it dry *thoroughly* before you start tweaking on paint jobs.