Aquashield are pretty unprofessional, I've done a few jobs for them in the past from my detailing business. Basically when they jetted the roof before the seal they didn't move cars on driveways so they got covered in debris then I've had to mediate and clean them to keep the customer happy. They've also attempted to clean them off and left scratches because of this, then I've corrected the paintwork for them. Telling my missus about their work she says they'll be on rogue traders one day...............then what do we see..........them on rogue traders. They where on for pushy sales.
BUT, there's a lot of profit in the business. Unforutnately according to the expert on rogue traders the sealant they use has nothing like the protection claimed.
If you're thinking of getting into it, I'd say look into it, there's a lot of money to be made. The best approach seems to be to pay door to door canvasers to get the customers.