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 Posted: Sep 12, 2016 02:12PM
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Self etch as the name implies just etches metal. An epoxy sealer will seal out moisture, which is what prevents rust.

 Posted: Sep 12, 2016 01:32PM
 Edited:  Sep 12, 2016 01:34PM
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thanks guys for the suggestions. Would self-etching primer also work and then undercoat?

PS: the Estate is looking pretty good Rick. Are there any updates?

 Posted: Sep 12, 2016 08:18AM
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In my case the undercoat was over seam sealed two-part epoxy primer on bare metal, undercoat came in sprayable cans & was paintable which we completed with lots of clear over the paint.

 Posted: Sep 12, 2016 06:08AM
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You want to seal the metal first with an epoxy primer.

 Posted: Sep 11, 2016 06:29PM
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Quote:
Originally Posted by minimans
I do it the same way primer seam sealer undercoat then paint. Although I like the idea of coloured undercoat! Trouble would be finding an exact match for a factory finish. If done from the factory the undercoat was always on top of the final colour and usually dealer applied. Rolls-Royce used a really heavy coating of a wax type under seal more like cosmoline, horrible stuff 
Paul, you mix the car paint colour in with the product and then spray it on the panels, easy peasy.

If in doubt, flat out. Colin Mc Rae MBE 1968-2007.

Give a car more power and it goes faster on the straights,
make a car lighter and it's faster everywhere. Colin Chapman.

 Posted: Sep 11, 2016 03:49PM
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Quote:
Originally Posted by minimans
I do it the same way primer seam sealer undercoat then paint. Although I like the idea of coloured undercoat! Trouble would be finding an exact match for a factory finish. If done from the factory the undercoat was always on top of the final colour and usually dealer applied. Rolls-Royce used a really heavy coating of a wax type under seal more like cosmoline, horrible stuff 
Back in the day undercoat was an option applied over paint. That nasty thick stuff that would dry up, crack and then trap water! 

By the late 80's, early 90's a flexible rubberised sealer was applied at the factory over the top of the undercoat. This then had top coat applied over the top in areas that would be visible once the car was built up and on it's wheels.

If you look at Rick's pictures you can see one where the black sealer is being applied then later the top colour coat being applied. The sealer does not come pre-coloured to match the car.

 Posted: Sep 11, 2016 06:02AM
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Here's my sound resistant and heat resistant undercoating that is body color matched. Can be matched to any color perfectly. If you're curious about how it was applied, you can ask a few of the guys over there. Dan will be able to tell you the step-by-step.


//restorationmini.com/forum/index.php?topic=473.175

 Posted: Sep 10, 2016 11:48PM
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I do it the same way primer seam sealer undercoat then paint. Although I like the idea of coloured undercoat! Trouble would be finding an exact match for a factory finish. If done from the factory the undercoat was always on top of the final colour and usually dealer applied. Rolls-Royce used a really heavy coating of a wax type under seal more like cosmoline, horrible stuff 

Mini's are like buses they come along in a bunch

 Posted: Sep 10, 2016 06:04PM
 Edited:  Sep 10, 2016 06:12PM
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Image Gallery
Blast the shell after steel work, epoxy primer, seam sealer, undercoat, paint...

 Posted: Sep 10, 2016 04:59PM
 Edited:  Sep 10, 2016 05:00PM
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It depends on the look you want Abel. Black fresh undercoating always looks like you are covering up problems to me. I have used a product similar to Rhino liner but it is clear until you mix the color you want in it, when sprayed on it looks factory. The benefit to mixing them both together is the color does not chip or flake off like it sometimes does when color is applied over the undercoating.

If in doubt, flat out. Colin Mc Rae MBE 1968-2007.

Give a car more power and it goes faster on the straights,
make a car lighter and it's faster everywhere. Colin Chapman.

 Posted: Sep 10, 2016 04:40PM
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when undercoating on bare metal, what's the best way to do it?

1) Undercoat
2) Primer
3) Base coat

I normally apply the undercoat last, but was wondering if I was doing it right,
cheers,
Abel