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rust


Guest Chumpalot

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Guest Chumpalot

Not technical as such, thought this was the best place for it though.

 

Whilst washing the car I noticed some rust between the roof and the boot (see pic). Does this look serious to anyone? Should i look towards perhaps getting it treated?

 

Thanks

 

Dave

Supra 018.jpg

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Guest Chumpalot

Thanks for the reply. I'm hoping it's just surface rust. Could i get some hammerite on there perhaps? I'll check the boot lid now... :)

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You really need to get rid of it now before it goes deeper & spreads.

 

Take the boot lid off so you can get to it.

 

Get a dremmel (or cheap alternative from Argos or even Woolies).

 

Mask off around the area

 

Grind the rust away making sure its all gone. Wear goggles & a mask.

 

Treat with Jenolite rust remover (can get it on ebay). This is a very strong acid, so wear gloves & goggles. Use a 3M Scotchbrite green pad (available for oven cleaning etc) to rub at it while the acid is on it & wet. Leave for 20 mins, then re-apply acid and rub again. If there are any black spots on the metal keep applying every 10 mins and rubbing with Scotchbrite until the spots are gone. They are rust and no matter what the bottle says they need to be got rid of as there is fresh rust underneath.

 

When finally shiny metal remains wipe with Jenolite on a clean cloth, then with thinners a few minutes later (not water!).

 

Allow to dry for an hour, then prime with etch primer or zinc primer. Give it a few coats, let it dry for a few hours, then flat down with 800 wet & dry (only use it wet).

 

Now time for the top coat. Give it 3 or more light coats, allow to dry then rub down with 1200 wet & dry (wet again).

 

Final top coat x 3 and job's a good'un!

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mine has a touch of surface rust there too, nothing as bad as that though. It's a common spot for supra's unfortunately. In fact I think mine is mostly just rusty water marks from where a small area , possibly the hinges have got wet.

 

When the weather is better, I was going to clean it up and treat it with rust killer as mentioned, then I thought the best thing would be some Waxoil, as that area is a water trap at the best of times.

 

Would this not be the best plan of attack, to completely seal it with Waxoil? You can hardly see in there so it doesn't really show much.

 

Out of interest, why does the water get trapped there? Are there drain holes that get blocked or is it just the way it is?

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It shouldnt get trapped there as the water should run down the sides of the boot... and get trapped by the boot rubbers if the car is stationary.

 

Just looks like a spot where the paint coating didnt need to be as thick maybe?

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yeah I do think it's common problem on many supras, maybe the paint is not so good there then.

 

So, what do people think about waxoil for that area. It's not colour coded but it's not like it has to be body colour finish (just not rusting) as you can hardly see it and getting rid of the rust properly and permenently has got to be priority no 1.

 

I don't think painting it body colour in an area like that is such an easy job and even with special primers I wouldn't necessarily feel that a diy job would be fully effective for many years to come

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I painted the area under the scuttle panel where the wiper mechanism is with a 'No more rust' black paint. As its not seen then there's no problem with paint match.

 

If you remove the rust completely as I detailed above there's no reason for it to come back at all. I got 5+ years on similar areas of the Jag.

Painting shouldn't be a problem either as its mostly a hidden area, and with careful masking off along a panel line it should not be obvious.

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