Continuity: When Marty is first getting ready for the beginning of the movie shoot, he is holding up clothes and he is still blue with orange hair. In the next scene when he is going to the limo, he tells Monty he was up all night with a scrub brush and a can of turpentine. The scene with him picking out the outfit was in the morning, so if he was up all night, wouldn't he have already cleaned the blue and orange off?

Continuity: When Marty Wolf gets out of his pool, his shorts aren't dyed blue. If that one little bottle of light blue dye was enough to dye Marty Wolf's skin, it certainly would have dyed his shorts.