Welcome to the madness Born...
The proper size for posting is 640x480. You can resize them using your photo viewing software. Many sign up to Photobucket for free and use that to post pics from. On Photobucket you can set the size to 640x480 and as the pics upload, they will automatically resize. Easy enuff.
Then when you post in your thread here, you simply click on the yellow pic box, then copy the "http photobucket link, aka img code" and click, done.
As far as painting, the Holiday you see in my avatar was done with Rustoleum, not marine just good old trusty rusty. I may have 50.00 to 75.00 bucks in paint on her.
Also look at Andy in NY's boat and our good buddy RickAirMedic's resto as they also used this paint with great results.
Ricks thread
http://forums.iboats.com/showthread.php?t=322858&highlight=rickairmedic
Andy's
http://forums.iboats.com/showthread.php?t=325842