I live in the city and I really do not have the space to do my own wash at home. I have been going to the local coin-op car wash and doing bucket washes and quick washes (using their pressure washer soap) and leaf blowing to try. Now that I have coatings on my cars, I wanted to try to utilize touch-less washes as much as I can. Is it possible to connect my own foam cannon to the pressure washer? Do I need a special attachment?