Body/paint floor questions

Thanks Larry, I have a mig welder dad bought for me 7-8 years ago. It has the capability for Argon or not. I've used it a few times. It's not the quality of a Hobart, but I'm sure will produce decent quality welds(hopefully) There is no body welding to do, just "tidying" up the underside.
Steve, I hadn't welding since H.S. so I picked up a Hobart Handler 140. When Northern Tool was running a sale. Re-taught myself how to weld. great little piece. I wouldn't be afraid of it.

Thanks MM74, I appreciate the feedback on the Amerlock2. It's available from Dulux paint store and $150 Cdn for a "kit". Which I believe is 2 1 gallon cans.
That's a few votes now for Rustoleum. This will never be a show car but hopefully not rust. Strict budget unfortunately. Probably have a "Mad Max" feel to it lol.
I have used Amerilock paints and its extremely durable. It has very high solids and covers great. The down fall of using it on a car is that its not flexible at all and will crack. Not to mention, its very expensive as far as I know. We use it at work (petroleum storage plant) on tanks and pipelines.
I used it on the inside and bottom of my car and then went over it on the bottom with spray in bedliner. Its very unlikely this car will ever rust again. But like I said, its very hard and will crack or chip if something hits it hard.
You want something cheap, get some rustoleum rusty metal primer. You can thin it and spray and its much like the primer mopar used back in the day.