Here is the link to Crispy's dash removal How-to.
Dash removal
You need to remove all the peices to paint them....at least to do it correctly. Remove them and strip them off any and all components, ie. headlight knob. Wash them all off with Dawn, then sand them all down with 400 grit paper. Wipe them clean of all sanded dust. Spray them with sandable primer, use the white sandable primer for plastics. Use several thin coats, and let dry. When completly dry, lightly sand them all down with 600 or 1000 grit paper, wipe down with cloth to remove sanded dust. Now paint them with your base color, be sure to use several thin coats, allowing each coat to dry before applying the next coat. When dry, follow the same steps with a clear coat. Allow to dry at LEAST 24 hours, then re-install. Becareful with them, it takes a few weeks to cure.