David Arquette -- Picks Spray Paintin' Over Strippers ... for Vegas Bachelor Party

David Arquette is an artist at heart ... even with ass in his face -- and the freshly tagged wall of a Vegas strip club proves it.

Our stripper sources tell us ... Arquette and his boys were at the Hustler Las Vegas last weekend for his bachelor party -- but instead of draining their bank accounts for lap dances .. they went outside and put a fresh layer of graffiti on the side of the club.

David's been dabbling in graffiti, and as a Hustler L.V. regular ... we're told the club manager gave him and his crew the green light to tag at will. The whole thing took about an hour, but David's no fool ... his posse went inside for few dances before calling it a night.

At least that's the story they're telling his fiancee, Christina McLarty.