Depends on my strategy...
- If I just do a Waterless Wash, then roughly 20 minutes, plus maybe 5 minutes if I follow it with a spritz and wipe of D156
- If I do a proper 2-bucket-method wash followed by either a Wax-as-u-dry or a spray wax, then anywhere between 40 and 60 minutes. Also depends on how hot it is, and how long it's been since the last wash.
... If I'm also doing an interior clean, then add about 45 minutes more.