have a go if your not to bothered bout finnish any new pannels and welded and bear metal would want to be primed in a good primer i use upol 2pac high build primer its easy use and prep for paint when painting make sure all surfaces are properly degreased and dust free even for the primer use tack cloths and pannel wipe or a small bit of thinners on the tack cloth to clean the pannels when there make sure the pannels are warm to touch when priming put on a two or three light coats should give you good coverage on the pannels when dry i always wet sand the pannels to be painted with 600 grade wet and dry sand paper and finnish with 800 grade wet and dry sand paper this should give you a really smooth surface almost glass like when you rub your hand along the pannel dry off clean with tack cloths and pannel wipe or a small bit of thinners again when clean and dust free warm the pannel again and apply your main coat in light coats with a bit of time between coats if its a metalic paint mix the lacquer 50/50 with the last coat of paint give about 30 mins then apply one very light coat of lacquer to finnish lacquer is not needed on soild paint when buying paint try to get 2pac solvent based paint as it is a lot easier use than water based paint and try to get a bit of practice someplace on a wall door or somthing before you start to get used of the gun hope this helps