once all preped etc,
I tend to use a handy grip or a foam applicator,
I have a MF glove so i tap the whole tub out and just litrally wipe( just lighty surface) the applicator, then work it on paint , then leave few mins at most then buff off with a good MF cloth,
( only use light layers as it will proctect and last longer then, any large amounts is just a waste and will be removed with the MF cloth.)
this is should give u the idea..... - the fat american lol ,
http://www.youtube.com/watch?v=yz7iITZup_g&mode=related&search=
MF microfibre ( Sonus or MEGS or Swissvax or watever u have)
Hope it helps a lil