It can definitely be repaired, it would need extensive spackling, most likely with 2 part Bondo, then sended primed and painted.
this is something that should not take more than 6-8 hours in total, ob ... read more
What Abe said is correct. Professional installation of anything built is would be recommended. Depending on what type of proejcts you'll be doing in the workshop you may need special filters to keep t ... read more