Look into the wipe-on/wipe-off way of applying KSG (search for WOWO, you'll get hits). I prefer to do everything by machine that I can, but WOWO is pretty much like quick detailing your car, and I've not had problems with the smearing that can happen if you apply KSG too heavily, wait, then buff.
YMMV, offer not good in Tennessee, (insert disclaimer here), etc. but worth a try, IMO.