fize, if you are having trouble figuring out a "thin coat" keep a small spray bottle of detailer spray with you and just mist the area you are working, like Jonathan said 2 ft square, and it will be workable. If it gets hard to take off mist the surface and it should just wipe clean, shiny and dry. Try to get a waffle weave microfiber towel to remove the haze or a good cotton terry cloth towel. If you use a cotton towel make sure it is 100% cotton, otherwise it will be some percentage polyester which will eventually leave slight scratches.