Yes another couple Ospho questions.

Klleetrucking

Promoted Users
GM A Body

Would there be any merit to "flood" the floor supports with Ospho then rinse with a pressure washer?
I've blown them out with compressed air and got a bunch of dust and debris out.
The supports are solid OE and pristine except for appears to be surface rust inside them.

Second question, can the Ospho neutralization process be accomplished with a pressure washer as opposed to scrubbing?

Third question, (probably dumb) are the anti rust qualities of Ospho deleted when neutralized (as the term implies)?

Something makes me want to pressure wash all the cavities, nooks and crannies.

OR

Is it best to keep water away from the body as much as possible?

FWIW, it's just the shell and on a rotisserie.

Sorry for the rambling,
Kenny
 
Last edited:
We looked at inside areas before and anywhere the support is attached to the floor is going to be rusted anyway and will be the rust that starts again first.

The neutralization process is required to get paint to stick. Are you getting paint inside those areas? Flooding with epoxy?

I do not get the scrubbing part. Apply, rinse, see white film, apply again, rinse again, and keep rinsing until there is no white dust when the part is dry. When you get the coating, the final dust will rinse away. If you are not painting in there, you dont have to worry as much about the neutralization.
 
A lot of restoration shops, when doing a large area, use a pressure washer, which works great as long as the Ospho is still liquid.

Also missed the part of killing ospho rust protection; once neutralized, you have none other than etched and clean metal.
Even if you left it, we know acids over time self neutralize, so that is why you epoxy and flooding with epoxy in certain areas is done daily.
 
Last edited:
Good info guys.
I've been called a "cleaning freak" (among other things,)
I thought with the body disassembled and on the rotisserie it's an opportunity to turn it 360* and get after all the cavities with Super Clean and the pressure washer. I guess I'm asking is it worth doing considering the mess it'll make.

Flooding the floor supports with Ospho sounds counterproductive since it sounds like it looses it's preventive properties over time.
No, I won't be flooding them with epoxy.

I've had Ospho dribble onto sanded metal and thought, "it don't get much cleaner than this".
I painstakingly stripped the trunk to bare metal and was considering an Ospho wash then neutralization just prior to epoxy.
Again, is it worth it?

The trunk.
That grey stripe is what the whole trunk looked like.

Thanks for your tolerance and help, Kenny
 

Attachments

  • IMG_20210516_143308377.jpg
    IMG_20210516_143308377.jpg
    140.2 KB · Views: 126
  • IMG_20210516_143325253.jpg
    IMG_20210516_143325253.jpg
    175.9 KB · Views: 105
I'm not exactly sure what your asking or want to hear as Barry answered your initial questions.
Flooding the floor supports with Ospho sounds counterproductive since it sounds like it looses it's preventive properties over time.
No, I won't be flooding them with epoxy.
You would flood the floor supports with Ospho, then neutralize with water, in order to flood them with epoxy, and be ensured the epoxy sticks.
I guess I'm asking is it worth doing considering the mess it'll make.

That would be up to you and what your expectations for the finished product would be. And remeber you need an 80 grit scratch on the metal. Wire wheel brushes and black cookie discs do not give the needed scratch. If you use those products you need to go over the metal afterwards either by machine or by hand with 80 grit. You don't need to do a lot, just get some scratches on the metal.
 
Back
Top