I am currently repairing rust on my longitudinal/hell hole/jack receiver. There is surface rust in many inaccessible locations, between layers of sheet metal in the longs and spot welded seams and inside surfaces of the longs. I believe this is where the deterioration of our cars starts.
What products are being used to stop and prevent rust in these inaccessible locations? Are they effective?
Your comments and advice are appreciated in advance.
Thank You
Full Version: longitudinal rustoration
Pictures! 
Phosphoric acid seems to be the common choice. Naval jelly, Ospho, POR Metal Prep are all trade names for it. I think most of the "rust converters" use it as a working ingredient as well.
--DD
--DD
As Dave correctly pointed out, those products can effectively deal with rust on surfaces that they can be applied to. But as we all know, in a 914 the rust you can see is just the tip of the ice berg.
The way the metal is sandwiched and layered in spots makes it almost impossible to get at all the rust that might be present. All I could think of was to use one of the products in aerosol form and really saturate the area. I also used a multi direction spray nozzle on a extension tube to treat the longs and other less accessible areas.
Not a perfect solution but it was all I could come up with.
The way the metal is sandwiched and layered in spots makes it almost impossible to get at all the rust that might be present. All I could think of was to use one of the products in aerosol form and really saturate the area. I also used a multi direction spray nozzle on a extension tube to treat the longs and other less accessible areas.
Not a perfect solution but it was all I could come up with.
I agree with Mike on the sandwiched metal...not sure what can be done there.
For blind areas (insides of the longs, tunnel, etc.) I would go with a product such as this:
http://www.eastwood.com/internal-frame-coa...-nozzle-qt.html
I used in in the tunnel of my 914 and between the inner/outer firewall. The flexible extension and multi-directional sprayer worked well to cover everything. I can't speak to it's effectiveness though, as I just applied it last year. Time will tell.
For blind areas (insides of the longs, tunnel, etc.) I would go with a product such as this:
http://www.eastwood.com/internal-frame-coa...-nozzle-qt.html
I used in in the tunnel of my 914 and between the inner/outer firewall. The flexible extension and multi-directional sprayer worked well to cover everything. I can't speak to it's effectiveness though, as I just applied it last year. Time will tell.
Sorry I should have included pics. here are a couple.Click to view attachment Click to view attachment
The rust is not that bad, yet, but I would like to stop it. I'm not going to probe any further there still is a lot metal thickness. I will replace what I have removed and do some further external reinforcement.
I once heard of a product that creped into cracks and crevasses by capillary action to kill rust but I can not recall where.
Thanks for your response.
The rust is not that bad, yet, but I would like to stop it. I'm not going to probe any further there still is a lot metal thickness. I will replace what I have removed and do some further external reinforcement.
I once heard of a product that creped into cracks and crevasses by capillary action to kill rust but I can not recall where.
Thanks for your response.
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