- Part comes unpainted, for the best finish please use light coats of Tamiya spray paint for plastic or airbrush if possible to bring out the details: lugnuts, wheelstuds, wheel bolts, step lips, etc. Occassionally the parts may arrive not completely cured. You can tell by a slight grainy feel to the part. In this case, [u]before painting[/u], let cure completely in UV light (sunlight) for 1 hour, then a quick soak in degreaser and wash with dish soap...