I finally got around to cleaning my Fuji gun today. I've been properly maintaining the interior, but the exterior of the gun was getting downright ugly. Since I only spray waterbornes and shellac, I wiped it down well with DNA which worked fairly well along with a lot of elbow grease. There are still a few gunked up spots, I'd like to clean better, but my thumb got numb from all that rubbing! Is there any stronger solvent that will work for this job? Thanks for the help.