I've done it before as well

a few years ago. Had pre-sprayed a big house in Bournemouth before I knew my wand was cracked. Never did get to go back and finish the job

Had to cancel my second job last week as I was running late, the customer gave my girlfriend a load of abuse, what a dick, felt like punching the idiot. He had Chemdry there today, I was working around the corner.
At this early stage (or any stage) last thing I want is a bad name, although it was my fault for leaving the wand in the van his reaction was OTT.