Re: Painting the motor
I concur. Do the messy stuff first. After the lapping, grinding and dirty jobs, clean the parts you want to paint well using a grease cutting solvent such as BrakeClean, let it dry and shoot the color.
I like to paint the head and cylinder seperately then sand off the paint on the edges of the cooling fins. But that's just personal preference.
I've had very good luck with just ordinary spray enamel and don't worry about engine/high temp paint. The parts really don't get hot enough to compromise the paint. Dupli-Color seems to work well as does Rustoleum, Krylon and even model airplane paint.
I also give the completed and painted engine a coat of TopFlite model airplane clear to fuel proof the paint but I've also gone without that step with good long lasting results.
Good luck and show us the finished product.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"