haha ,yes I used approx. half a can of Bill Hirsch paint ( a quart can )to brush my engine that former owner had painted bright yellow!
It took me about 2 hrs to do the top part, leaning over getting a back ache...but used a very long skinny brush...then a couple of weeks later borrowed a friends lift spent another hour doing the bottom....cleaned all off w laquer thinner first...looked pretty good, but you`ll find there`s a couple of areas (if you need to cover other color)that are going to be very tough, esp. around the starter and pulleys...
and after you paint , you dont want to run the engine for 3-5 days...curing time...

and I do have a half can left...for touch ups in the future...
The new heads I just put on , I re-painted before installing...