This question has options. How would someone go about accomplishing this goal?
To paint a toy shotgun as part of a project to make it look steampunk

Pick from:
(A). Paint the shotgun using latex wall paint. Wait for the paint to dry then apply another layer. Finally, sand off any rough spots..
(B). Disassemble the shotgun and spray paint each part the color you want. Apply several layers of paint. Reassemble the shotgun..
(B).