There are a lot of stone care professionals who have to balance getting work completed in the field with doing estimates. Some people carry an extra shirt in the truck for days like that but what happens when A) you forgot to grab the extra clean shirt so you won't look like a mess when you show up to someones house or B) forgot your apron (if you ever carried one) at the shop.
Well. Protip for stone refinishers - use tape and drap to make a on-the-job apron.