So I decided to take everyone’s advice and ditch the idea of purchasing the tots '78 coveralls and found a nice pair of Big Macs with a nice blue where is looks grey/green in the pictures. Only thing I’m noticing is there are quite a bit of paint marks on them. In that case, my next inquiry is are there any methods for removing paint from clothes new/old?
Here is a photo of them

Keep the paint on. Gives it a more realistic look
Honestly I’d opt to keep the paint, it adds character to it
Keep them as they are, no need to clean them
I add paint to mine lol. I take sand paper and sand around pockets and cuffs ect. Then I add gray and brown dry brush lights over them and all the zipper line. I then take a spray paint and lighty spray the knees and elbow and thighs and whipe off while still wet to give them a worn type look. You have to remember he steals used worn coveralls to wear so they’re needs to be some wear and tear look to them.