pretty cool site.. I like this.
yea, that cancer isn't too friendly is it?..
I did that chemical treatment trick and used a wire brush, sandpaper, grinding tools and anything that made it easier to scrape over every single inch of that rust. Pile some good primer on there too. Maybe rust inhibiting stuff... I'd suggest applying more coats than you should..
Buy a gallon and just pour some into the floor pans.. -slop it around real good and even it out.. hey, don't do it just once.. it's kinda fun so you can do it a few times..
(oh, and if you're in your dad's driveway then you'd be better put something under the LUV
BEFORE you start, so it can catch all that paint that runs through) hehehe.. Hey, at least I can laugh at myself..
Even if you make new holes, or make the old holes bigger by grinding, that's not so bad cause it's better than covering-over untouched rust in there I assure you!
I took some old metal realtor signs and cut out a few shapes that would fit over the holes nicely and just popped a few rivets around the perimeter.. glue the pieces of sign onto the floor with like some crazy silicon caulk or some spaceage product that hardens, and pop it in there.. -seal it up!
Don't be scared to try to fix it, but be scared if you don't!
Or, on the other hand if you decide to take it to a welder to get the entire floor pans cut out and replaced then be sure to shoot me a line cause I'd use those floor pans in a heartbeat.. -those are in great shape!