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Old 17 July 2014, 16:30   #11
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From an electrochemistry perspective the zinc is more electropositive than the aluminium, therefore the aluminium will corrode preferentially over time. o)
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Old 17 July 2014, 16:31   #12
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What do you guys use to get rid of the last really tough bits of original paint ? (The bits you cant easily sand or wire brush)
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Old 17 July 2014, 16:32   #13
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What do you guys use to get rid of the last really tough bits of original paint ? (The bits you cant easily sand or wire brush)
I just blast it ,, spoilt where I work

Failing that paint stripper
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Old 17 July 2014, 16:33   #14
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What do you guys use to get rid of the last really tough bits of original paint ? (The bits you cant easily sand or wire brush)
Patience.
(I SMART repair cars & caravans professionally & sometimes things take a bit longer, but the quality of the prep work will be reflected in the finished job)
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Old 17 July 2014, 16:35   #15
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From an electrochemistry perspective the zinc is more electropositive than the aluminium, therefore the aluminium will corrode preferentially over time. o)
Would have to disagree sir,

Aluminium

For aluminium and its alloys, although the clean surfaces are easily coated and adhesion is excellent, performance can be upgraded using a proprietary zinc chromate conversion coating.
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Old 17 July 2014, 16:35   #16
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LOL

Any special kind of stripper (besides blonde, obviously )
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Old 17 July 2014, 16:36   #17
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local powder coaters use zinc chromate on wheels and swear by it . iv had wheels done of them and they have chipped. wheels I have painted myself and used DuPont 635 2k as an etch never had any problems .I was only offering advice for a diy job based on my own experience
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Old 17 July 2014, 16:38   #18
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local powder coaters use zinc chromate on wheels and swear by it . iv had wheels done of them and they have chipped. wheels I have painted myself and used DuPont 635 2k as an etch never had any problems .I was only offering advice for a diy job based on my own experience
No probs , as your self can only vouch from my own experience , Most etch used is over applied in my experience ,,and this is a big no no,, Enjoy your night sir Ed
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Old 17 July 2014, 16:46   #19
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read somewhere that someone used a propane torch to warm the metal and get a glossy appearance. Have you tried this?
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Old 17 July 2014, 16:49   #20
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read somewhere that someone used a propane torch to warm the metal and get a glossy appearance. Have you tried this?

On plastic bumpers and similar products

Using a hot air gun. You can get it to go glossy again if mated off
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