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FKA: noble97monarch
Supporting Member of Barthmobile.com 3/12
Picture of Moonbeam-Express
posted Hide Post
quote:
How come?

Are they aluminum? If so, you probably need to wet sand for about a week first. They also may be anodized.




Formerly: 1997 Barth Monarch
Now: 2000 BlueBird Wanderlodge 43' LXi Millennium Edition DD Series 60 500HP 3 stage Jake, Overbuilt bike lift with R1200GS BMW, followed by 2011 Jeep Wrangler Unlimited,
“I haven’t been everywhere, but it’s on my list.”
 
Posts: 2228 | Location: Laurel Park, NC | Member Since: 03-16-2008Reply With QuoteReport This Post
First Month Member
Supporting Member of Barthmobile.com 11/13
posted Hide Post
quote:
Originally posted by noble97monarch:
My paint guru says no good way to paint polished aluminum. It would need to be scuffed up which would ruin the shine.


He's right.

The more highly polished the surface, the more help it needs for paint to stick.

In aircraft, we used a chemical etch instead of scuffing. Phosphoric acid based. Smelled like peaches. Can't remember the name. Vinegar works, too, if you would rather smell pickles than peaches.

There are self-etching zinc chromate primers out there that do it in one application. Boat shops often sell the Dupli Color brand.

I had a friend who painted a brand-new airplane part without etching. He was a super painter, but no aluminum experience. The paint literally fell off after a week or so.


.

84 30T PeeThirty-Something, 502 powered
 
Posts: 6169 | Location: AZ Central Highlands | Member Since: 01-09-2001Reply With QuoteReport This Post
First Month Member
Supporting Member of Barthmobile.com 11/13
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quote:
Originally posted by Bill N.Y.:
I tried to polish my bumpers... all I got was something akin to a Nickle Finish. How come? Confused


Some Barth bumpers are not solid aluminum, but are plated.


.

84 30T PeeThirty-Something, 502 powered
 
Posts: 6169 | Location: AZ Central Highlands | Member Since: 01-09-2001Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 12/12
Picture of Lee
posted Hide Post
quote:
all I got was something akin to a Nickle Finish. How come?


Bill, if your bumpers are like mine, they're extruded. Because of the molecular grain of the aluminum in
the extrusion process, virtually no amount of reasonable surface prep is gonna give you the final finished surface of rolled aluminum stock that's been polished. Options: Be happy with clean, uniform, satin finish, or hit Lotto and have them triple-struck with copper/nickel/chrome plating Wink
 
Posts: 1266 | Location: Frederick, Maryland | Member Since: 09-12-2003Reply With QuoteReport This Post
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