paint motor with a brush?

The 74 'Cuda that I owned had an engine in it that was painted burgundy when I bought it. Because I had no plan to pull the motor I brushed orange over it and it turned out very nice. It was really a pita trying to do it in the engine compartment but I was able to get to everything that was visible. I did have to use solvent to clean up any areas that i got the new paint on where I didn't want it. I used a series of different sized brushes and spray engine enamel that I first sprayed into a cap and then dipped into. The spray enamels do tend to dry fast but that was OK. It made the paint thicker and covered better. I had poor luck when I tried using a ceramic paint though. It tended to want to curdle the previous coat when I tried to hit spots I'd missed.