jetseal seems to buff off better than most acrylics i have used lasts great especially good on alloy wheels brake dust will just wipe off no worries

apply with a nice damp applicator pad
leave for 20 mins
then buff off leave for another 20 mins then apply one more coat do the same, if you want a really long lasting finish top off with collinite 476 will last for ages and bead like crazy.
when you want to wash your motor a pressure wash will do most of it, however if it is not clean enough always use the 2 bucket method of handwashing and use a wool mitten not a sponge it will help the finish last better,
a good quality shampoo is meguires gold class or sonus gloss shampoo
thanks
dave