How much rust do you remove?

[Mac2Night]

I'm hoping to save the bed floor of my newly inherited '71 halfcab this weekend but need to know how much do I scuff/sand the areas that have started to develop surface rust before I hit it with some POR-15. Do I grind it until it shines, or do I leave something for the POR to bite to and convert?

Also, once I get ready to paint the truck or bedline it, I should scuff/sand the PORed areas and prime before paint or bedliner.... right?

Thanks,
Mac

 

[JohnJohn]

You could hit it with a wire wheel on an angle grinder to get the loose stuff up and to clean the metal before hitting it with POR.
If you are going to put a spray in linner you should be able to just scuff the POR before the linner goes in.

Best thing to do is call POR and ask them then your the bed linner company to see what they recomend. POR is very good about providing advise.

 

[Devin]

X2 - just knock the loose stuff off, then follow the POR-15 directions for prepping the surface.

 

[garberz]

X2 - just knock the loose stuff off, then follow the POR-15 directions for prepping the surface.

This is what I did also. The Line-X guy sanded most of the POR 15 off because it too smooth. Most holes can be covered with aluminum tape and sprayed over. Including rust holes if there not too big. Line-X prep is #80 grit on a sanding wheel.

 

[Heus33]

Doesnt POR have a bedliner now too?

 

[Devin]

Doesnt POR have a bedliner now too?

Yeah, they do.

 

[Mac2Night]

Cool, thanks for all the info and advice.