How would you treat drive tunnels and prevent future rust? (pics) - Saab 900 Bulletin Board - Saabnet.com
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How would you treat drive tunnels and prevent future rust? (pics)
Posted by TomB (more from TomB) on Fri, 16 Oct 2020 09:41:24
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So I recently cleaned out a TON of mixture of dirt, sand, rocks from the drive tunnels on my C900. Years worth for sure and it was no fun.
They will never be cleaner than they are right now.
This car doesn't see winters. It sees the occasional rain storm and it does get washed so moisture can definitely find it's way down there. What I've noticed is that even after a week, the area was still wet until I got all the sandy grimy grit completely out with a second round of cleaning. It's no wonder why this is a problem area for this car. Most the of drains were completely clogged, they are TINY. And there are "grooves" at all the edges that basically hold water and dirt.
I'm thinking of using a rust converter (Black Star) over the area, letting it fully cure (48 hours). I don't think Black Star is like POR-15. It's not as thick and is more like Ospho (goes on thin).
I think POR-15 is bad for this area given the way the area is designed. It would block drains and just trap moisture around the POR-15? Also I don't think my areas are bad enough for POR-15? What do you guys think?
AFTER the rust converter has fully cured I'd follow up with either cosmoline (CRC Heavy Duty Rust Inhibitor spray) -OR- a Woolwax/Fluid Film product.
What have you guys done / would do in this situation?
posted by 75.68.12...
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