Hi,

I have a 96 Ford F-250 PSD Since new. The body and paint is For the most part free of rust. But the undercarriage is a different story. I have been using a wire wheel, and 50 grit sanding disc on 4" angle grinder. It is coming off quite well. Not rusted through anywhere just surface rust. My question is without removing the bed how do you get into the really tight spots? Can i just knock the surface rust off and spray with rust doctor or something similar? I want the areas you can see to look nice(going to use spray paint) but the ones I can't see all i want to do is stop the rust. Any ideas or steps i need to take. I will say this is a big job

Thanks for any help.

 

You could try this stuff. I'm thinking about purchasing some to blast the undecarriage on my '98 Ram 2500. Here's the link to the restorations page:
http://www.safestrustremover.com/restos.asp . The pump recirculation method used on the '76 Lincoln Mark IV looks interesting.

 

POR 15 expensive but worth it..

 

Evapo Rust, located at your local Auto Zone is very good. In addition to, you do not need to wear gloves.

 

Thanks for the responses. I have decided to remove the bed and do it right. It is just to hard to get the top of the frame rails. I guess it will be cab back frame restoration.

 

If youre going to go that far you could just strip everything off with a sand blaster and paint the frame with zinc chromate primer and a good quality rust resistant paint like eastwood's rust encapsulator or POR-15.
You can use those rust convertor things based on tannic acid or the ones based on zinc/phosphoric acid, but they need clean surfaces to work well.

 

With my experience working at a body shop, taking off the box is not a big deal. The only way to cure rust is sand blast the heck out of it and quickly get the frame covered with some high quality primer. Paint and then put rhino liner on it or something so it wont rust for a very long time.

 

I've heard that some kind of spray called 336 and a penny works well.