We do a bit of pressure washing mainly domestic but have been asked by an existing customer to do a block paved area 1700 sm , it’s never been cleaned it’s 10 years old and is at a university campus there is a lot of chewing gum that they want removing they have stated they want it treating with a sanitiser first then pressure washed . We don’t have a hot washer only cold and think it would need hot to remove the gum ? Any advice on doing the job or pricing would be appreciated they also want it re sanding , thanks in advance