Yup, I'll be adding the signals as soon as I can find a decent deal on the parts.
As far as smoothing them, very simple. Sanded them down with 180 grit paper until i got down under the bumps (didn't take much) then smoothed out with 600.
Prep with wax and grease remover, then one coat plastic primer, 3 coats red, 4 coats clear, and an overnight dry in the house.
Simple, effective, easy, and about 30 bucks total. Win!