Craigs List, swap meets, shops, is like buying a bag of apples, bound to be a bad one in the bunch eventually! Consumer beware! Yes, he should of told you it "needed more prep work" or at least stated "he could not gaurentee welding it as is". A good professional would have prepped it correctly before he ever started! Honesty, nowdays, does not mean what it used to. "He simply took the money an run" I would get a lawyer and "run after him"!
