Chris, When I put my booth up I had no clue about the correct materials-just running through the jungle blind.... Like you, I used the rolls of plastic drop cloth type plastic sheeting. I mopped floor, walls and wiped the ceiling down between coats and fogged a good spray of UV clear in the empty booth between base and clear. I painted in pieces so the cleaning process was pretty painless. I'm not saying it's the right way, but it was successful. You got what you got, so just take the extra time to make sure its as clean as it can be. After 10 years, my "temporary" booth needs new plastic...I'll do it different this time.