Aside from Powder coating the frame, what is my next best option?

I am open to any suggestions.

I have heard POR-15, and Eastwood Internal Frame coating thrown around as top products for sealing the frame effectively and making it nice and pretty. I also heard using evapo-rust on the inside of the frame does a primo job at making it ready for the Eastwood sealant.

I would love to hear some techniques of those who have really gotten at it with weatherproofing the frame of their cars.

here moved this thread to where it belongs