[s-cars] Re: [audi20v] Re: what paint for coil springs

[Jerry Scott]

Powder coating is a plastic vinyl powder that is sprayed onto the part, 
then heated in an oven to melt the material to a smooth finish.  The 
small torsional movement of the spring wire should not be enough to 
disrupt the vinyl adhesion to the steel.  I would say that the surface 
was poorly prepared before the coating applied. The coating is not a 
hard finish, but rather a soft plastic flexible coating.
Jerry

Peter Schulz wrote:

> Dave:
>
> My concern is that powdercoat is typically a hard finish- and good for 
> "static" items.
>
> Springs by nature will twist and move - they are dynamic.
> - which is probably the reason that in alot of cases, the powder 
> coating fails and comes off in large chunks.
> It's interesting that only the front springs are rusting - the rears 
> still have their blue powdercoat finish intact.
>
> I was thinking that a finish with some flex would last longer in the 
> dynamic spring environment.
>
> -Peter
>
>
> At 09:10 AM 6/21/2005, Dave Hord wrote:
>
>> How old are the springs though?
>>
>> The thickness of the coating, and the type used will effect how long 
>> the coating lasts.
>>
>> I say powder-coat them as I was having this same discussion a month 
>> ago with a friend who works for a major spring/suspension 
>> manufacturer. In their testing, powder-coating was the most durable 
>> finish.
>>
>> -Dave
>>
>> -----Original Message-----
>> From: Peter Schulz <pcschulz at comcast.net>
>> Date: Tue, 21 Jun 2005 09:07:26
>> To:dhord at rogers.blackberry.net, "Audi 20V" <audi20v at rennlist.org>
>> Subject: Re: [audi20v] Re: what paint for coil springs
>>
>> Dave:
>>
>> The powder coating that was on the springs seems to have failed....
>>
>> so that's probably not the best solution.
>>
>> -Peter
>>
>>
>> At 08:08 AM 6/21/2005, Dave Hord wrote:
>> >Powder-coating is exactly what you should be doing.
>> >
>> >All high-quality springs are powder-coated.
>> >
>> >-Dave
>> >
>> >-----Original Message-----
>> >From: Peter Schulz <pcschulz at comcast.net>
>> >Date: Tue, 21 Jun 2005 08:05:45
>> >To:"Audi 20V" <audi20v at rennlist.org>
>> >Subject: [audi20v] what paint for coil springs
>> >
>> >Picked up a set of used 250 lb coil springs from Dick Shine Racing 
>> for the
>> >Coupe.
>> >(Yes, they carry springs that fit the 80/90 CQs)
>> >
>> >Fronts are a bit rusty, and given that I live in the salty northeast 
>> u.s.,
>> >I want to address the rust immediately.
>> >
>> >Folks have any BTDT experience in painting the springs?
>> >
>> >I assume that unless the paint has some flex, it will eventually 
>> fail as
>> >the original paint did...
>> >so powdercoating is probably NOT a good option.
>> >
>> >TIA
>> >
>> >-Peter
>> >
>> >
>> >1991 200 20v Q Avant Titan Grey
>> >1991 200 20v Q Avant Indigo Mica
>> >1991 90 20v Q Red
>> >1990 CQ silver (awaiting S2 engine transplant)
>> >
>> >Chelmsford Ma, USA
>> >
>> >
>> >---
>> >You are currently subscribed to audi20v as: dhord at rogers.blackberry.net
>> >To unsubscribe send a blank email to leave-audi20v-75260R at rennlist.org
>> >
>> >--
>> >What one thing would you do if you knew you couldn't fail?
>> >
>> >---
>> >You are currently subscribed to audi20v as: pcschulz at comcast.net
>> >To unsubscribe send a blank email to leave-audi20v-75260R at rennlist.org
>>
>> 1991 200 20v Q Avant Titan Grey
>> 1991 200 20v Q Avant Indigo Mica
>> 1991 90 20v Q Red
>> 1990 CQ silver (awaiting S2 engine transplant)
>>
>> Chelmsford Ma, USA
>>
>>
>> -- 
>> What one thing would you do if you knew you couldn't fail?
>
>
> 1991 200 20v Q Avant Titan Grey
> 1991 200 20v Q Avant Indigo Mica
> 1991 90 20v Q Red
> 1990 CQ silver (awaiting S2 engine transplant)
>
> Chelmsford Ma, USA
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