Spi epoxy prep

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Scm1

Any extra preparation for bare metal prep? Car has some small rust pits that 80 grit won't get.
 
Scm1;21694 said:
Any extra preparation for bare metal prep? Car has some small rust pits that 80 grit won't get.

The rust must go, sandblasting or 24 grit grinder or Ospho but only if you nutralize it and you can call me for proper way.
 
I used dx579 and 520 and leaves white coating and a Lil surface rust on panels. Rust puts turned black?. Going to let dry sand down and apply waterborne w&g and epoxy. Should this be good enough?
 
you have to re wet the area with the same rust solution until all black pits are gone. wet it and rinse with water real well. dry immediately
 
I used the klean and strip phosphate and a red scuff pad and the black pits are going away. I'll do that one more time then rinse off let dry and 80 grit and w&g then epoxy. That ppg stuff I couldn't seem to get it right.
 
What do you guys do on inner fenders of unibody where you cannot sand blast and there is still little rust pits?
 
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