I dip my prop tips in Rust-O-leum oil based wt.it holds up well and fuel doesn't seem to do any harm to it,as well as sticking to the plastic composit of master airscrew props.
I dip the tips and give them a shake into a box to remove the exess so the paint doesn't drip once the tips are dry I will check balance if one side is a bit heavy I redip the light side pretty simple doesnt take to long.
I use a pencil to make a reference line so the tips are even as well.