Painting outdrives?

[Veg]

I've gotten support on this forum to go ahead and keep my I/O on a saltwater slip (see link below)

http://www.boatered.com/forum/topic.asp?TOPIC_ID=85021

So my question is: What is the proper way to paint the outdrives, if this is indeed necessary? They're Volvo Penta 5.7Gi duoprops.