Cracking on with the strip down and tackling the dodgy powder coat. I could see orangey rust stains on the floor so decided to remove the floor panel, only to find that there isn’t any rust. The orange stains are actually an oily greasy substance , any ideas on what it might be??
Untitle d

Also what’s the best way to rustproof the rivet holes in the chassis before re-rivetting?


Thanks

I'll take a guess at Waxoyl for both questions?!

[Edited on 3/12/18 by owelly]

Looks like cutting compound to me, somebody dribbling it into the drill to drill through the floor into the chassis and then not cleaning it up afterwards.

Think I'd go with a rust prevention or cutting compound of some sort. I know when I drilled my MK Indy chassis I sprayed Waxoyl type rust prevention substance inmany of the drilled holes. I also used closed pop-rivets as a means of preventing moisture getting inside the steel chassis rails as well.

One of the 2 seems likely! I'm not sure if I'm annoyed to have taken the floor off for nothing or pleased that its not rusty

quote:

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Originally posted by rufus357
One of the 2 seems likely! I'm not sure if I'm annoyed to have taken the floor off for nothing or pleased that its not rusty

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just looks like the kind of yuck you get in a dusty environment where grinding goes on, probably is rust, just not from your car

When I riveted my floor down I ran a bead of tiger seal along the chassis and around each hole, I also dipped each rivet in tiger seal before inserting and finally filled the head of each rivet with tiger seal. Hopefully that should keep any water out.

Not too sure about keeping water out as much as letting it out after getting caught in a downpour. I once saw a Viento with at least an inch of water in it

I'm planning on a few strategic drain holes in the floor to stop that happening.

You should really be using sealed blind rivets for the floor panel 😎

as above I have found getting water out more important than sealing it's amazing how much can fill up the floor in just one day and then it sloshes about everywhere violently while being sucked up into the slipstream, basically you end up soaked

So 95% of the powder coat appears fine from the outside but underneath it has these weird worm tracks. They are firm and not flaky very strange...

In my personal experience, that is very typical of the type of rust to be found lurking under powder coated components.

Seen it many, many times when re-furbing things that have been powder coated.

IMHO

Powder coat looks great to the eye but I much prefer a good prep & reliable paint system.

Looks like filiform corrosion