Jesus Plastering

I was saving this one for Christmas, and then I totally forgot about it! Oops. Better late than never, right? 

I don't know really what to make of this. Jesus Plastering Corporation. What does it mean? Do they only plaster Jesuses? Is Jesus the name of the owner and they just forgot an apostrophe? And why do you suppose they're missing a big chunk of their van? Was there a plastering accident, or just a regular old accident? 

If you're anything like me, you're wondering what "blue board and plastering" means. Luckily, Bob Vila explains it here.