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Post by snakeplissken81 on Mar 6, 2011 12:10:16 GMT -6
Hey guys, I stripped the chrome off a set of rims and wanted to paint them using alclad magnesium. Never using this color before I attempted to use the same technique I used when using the alclad chrome. I shot gloss black on the rims first. Let that dry, then shot the magnesium over that. It looked good wet. ;D But when the alclad dried not only did the black bleed through but also the orange plastic color of the rims.  Any help here is as always greatly appreciated. -Scott |
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Post by stilljustharley on Mar 6, 2011 15:33:36 GMT -6
Might be obvious but it sounds like you need to seal the plastic with something more than the gloss black. A good auto primer (that works with plastic!) should do the trick or Alclad's own gloss black might stop the bleeding.
According to the folks at Alclad, some of the colours are "hotter" than others and it sounds like magnesium is one of the really hot ones.
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Post by Starry Eyes on Mar 6, 2011 17:21:22 GMT -6
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Post by badroadahead on Mar 6, 2011 18:20:19 GMT -6
Whenever I want to paint a plastic that is molded in a color other than white, I first fine sand it to remove the shine. (I know wheels would be very difficult to sand), then prime it with a red oxide primer and let it cure for a week or so, then hit it with either gray primer or a flat white. If it bleeds thru the white then I re-prime with the red oxide. If I am painting a white plastic then I shoot it with a gray primer.
It seems that the red oxide has pigments that shield the colored resins from bleeding thru.......usually.
As far as what to use directly before the alclad magnesium? I never used that color and would try some experiments first.
When ever you strip paint or chrome make sure you thoroughly clean the parts with dish detergent and make sure to rinse off all the dish detergent and completely dry before painting. I use an old toothbrush to clean the parts.
I am wondering if the part you painted still had some residue of the stripper left on it, therefore not allowing the black to stick.
Just my 2 cents.
Dave
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Post by ShowRodFreak Don V. on Mar 7, 2011 13:48:12 GMT -6
I used flat black with magnesium a few years back. Worked for me.
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Post by noodles on Mar 8, 2011 9:10:23 GMT -6
I just tried Alclad 2 Laquer Clear Base as a primer for Alclad Chrome, worked fine.
Maybe it would work for the Magnesium?
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Post by Joe Stoy on Mar 8, 2011 13:10:02 GMT -6
I would like to know where I can get Alclad. my LHS does not carry it.
Joe
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Post by rustybill1960 on Apr 23, 2011 22:16:40 GMT -6
 Hey Joe Micro-Mark later Russ 
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Post by Starry Eyes on Apr 24, 2011 7:37:21 GMT -6
Hey Scott --- I just spray the Alclad Magnesium over a light coat of primer .. it gives a a nice dry /dull look ...
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Post by donut on Apr 28, 2011 9:45:30 GMT -6
Magnesium is one of the non-polished colors and therefore should be sprayed directly over primer without using the black gloss base, as Starry Eyes mentioned. You should use a goss black base for the Chrome and other highly polished colors only. I use the Magnesium for all my vintage racing rims. Good luck.
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Any help here is as always greatly appreciated. -Scott
