Applying SPI epoxy after soda blasting

C

cla5675

Member
Hey, all. I am in the process of helping a friend build a 1970 Mustang fastback.....his first build but not mine. Anyway, the entire car was soda blasted on a rotisserie last fall and we are now finsihing up the metal work. We have not applied anything to the bare metal yet as we have a climate controlled shop and the metal is staying very clean and rust free. I was about to order some SPI epoxy primer and saw on the tech sheet that SPI does not recommend their epoxy over a soda blasted car unless you call them first. Has anyone had succsess using SPI epoxy after soda blasting? If so, what steps were taken to neutralize the soda residue? We have used wax/grease remover on most of the car after going over it with 80-grit on a DA sander. Also, before I put down the epoxy I will use SPI wax/grease remover and I plan on using all SPI products througout the build.....possibly even the bed liner as an undercoat. Thanks in advance for your help!! I've been reading this forum for about a year and I've found a lot of useful tips and info. Thanks again!!


Troy.
 
Well, I've been doing more research on the subject and seems my friend may have really messed up going with soda blasting. I did find a response from a "BarryK" (more than likely the same BarryK on this site) to a similar thread on another forum:

"First way:
With a pressure washer and simple green or purple power wet the car and while the car is wet, rinse with a hose, do this at least two times and I recommend three times, and remember, if any of this residue re-dries, water will not neutralize it and it must be retreated.

Second way:
Dish soap with warm water and a red scuff pad scrub a panel and rinse with a hose before drying, we again recommend the car be done this way, three times just to hope you don't have a residue left.

I haver not tested vinegar or their new recommended cleaner and don't plan on it.
SPI"

I think we'll try method #2 on a fender that was blasted but had to be replaced. I'll then use that fender as my test panel and see how it goes.
 
When your steel starts flash rusting right after you wash it, you know it is clean. Take extra care in getting the soda out of seams, etc..
 
strum456;20682 said:
When your steel starts flash rusting right after you wash it, you know it is clean. Take extra care in getting the soda out of seams, etc..
Click to expand...

Troy, that was me and also note what 456 said, be very careful to clean any cracks or gaps.

If you have any question, just call me anytime as this stuff needs to be done right.
 
Will do, Barry!! Thanks for the quick reply!!. Now I know why everyone raves about SPI products and their service!!


Troy.
 
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