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Unbderside paint question

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Old Aug 20, 2017 | 09:33 AM
  #1  
steam643's Avatar
steam643
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Trailering
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From: West Pa near Pittsburgh
Unbderside paint question

How do I figure out how much Rust Bullet I need to coat the underside of my, 1997 F-250 super-cab, pickup truck? Is there a simple formula for this? If I try to figure the surface aria of it all I would be here calculating into the next decade. I would like to get 3 coats on it. My frame is rusting bad. Need new spring brackets.
 
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Old Aug 20, 2017 | 11:08 PM
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Kingkong0192
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Buy a gallon and go from there.

Depending on how in depth you're going to paint I'd say a gallon will be plenty.
 
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Old Aug 23, 2017 | 07:32 AM
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From: dirty jerzy
they has at thr home depot--- a product in a spray can rubberized undercoating---around $4 a can works great I think I used 10 cans
 
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Old Aug 23, 2017 | 11:32 AM
  #4  
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I used the spray can stuff and it lasted weeks before coming off. I ever prepped the surface well too.
 
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Old Aug 24, 2017 | 08:37 PM
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Kingkong0192
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That spray on bedliner will trap in moisture and make whatever you sprayed rot from the inside out.

Don't use it.

Use something like chassis saver or POR-15.
 
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Old Aug 25, 2017 | 02:32 PM
  #6  
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Dman03GT
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I'm using Rust Bullet on my build. Word of advice, read the instructions and follow them carefully. If you are applying to bare metal, buy and use the metal blast product they sell according to instructions.

I had to re-do my frame and axle a second time because I didn't follow instructions and the coating just peeled off like aluminum foil.

After following instructions it cured hard as a rock. I can take a wire wheel to it and it will not penetrate.

Bare Metal:




Etching w/ Metal Blast:






Coated:



 
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