Apply 'Shirt Blue' to Conceal Stains

just dob it on there you know so before I go do a bid or anything like that I don't want to have you know white paint all over my clothes it would look you know unprofessional and it wouldn't look good and um so I just take shirt blue and it does look like it's black right now but shirt blue it goes on black and it turns blue and it's kind of like you know the ceiling paint that goes on purple and turns white so it is shirt blue um