semi OT - Lame bodywork question

[haygood@aemail4u.com (Haygood)]

Just thinking out loud here, but if the bondo is covered with paint right after applied, should the paint keep the moisture out and prevent the rust?   I know that if you don't clean the old metal well enough you can leave some rust or dirt behind that will prevent the bondo from bonding and lead to rapid rusting, but if done right it should be OK, shouldn't it?  All the same, if you can POR under it, I'd do so for safety's sake.

You could also consider using fiberglass to fill in if the area you are filling is large, hole ridden and/or under lots of stress (like the corner of a windshield.  Bondo doesn't do as well as glass in large amounts when the material under it flexes at all.  Of course it does pretty well, but not as well.  So I'm told.  No experience with the fiberglass repair stuff myself.

BH

--- "Rhett Farnum" <rocco_crossing@hotmail.com> wrote:
>
>I believe that there is a new version of Bondo that actually is a rust 
>inhbitor.
>
>Peace Out,
>
>Rhett
>Rocco_crossing
>'83 Rocco (autocross ready, body work needed)
>'92 Olds Cutlass Ciera (DD)
>
>
>
>>From: Robbie Cotner <robw_z@yahoo.com>
>>To: L F <rocco16v@netzero.net>
>>CC: scirocco-l@scirocco.org
>>Subject: Re: semi OT - Lame bodywork question
>>Date: Thu, 16 Jan 2003 21:42:19 -0800 (PST)
>>
>>
>>Most things I've heard about Bondo state quite the contrary(on it's not 
>>rusting steel).  On the 240Z list everybody hates bondo with a passion, 
>>240's are fairly old('70-'73) and their owners deal with rust a lot.  
>>Apparently over time, Bondo actually absorbs moisture(only what I've heard, 
>>but heard frequently) and rusts the metal to hell.  Time and time again 
>>people were finding Bondo tucked away somewhere on there car, always 
>>accompanied by A LOT of rust.  In almost all cases it had even been painted 
>>over.  The few that chose to use Bondo would use something like POR-15 on 
>>the steel, paint it, bondo it, and paint over the Bondo.  Just thought I'd 
>>chime in-
>>Rob
>>  L F <rocco16v@netzero.net> wrote:Why Por?  if you're going to bondo 
>>anyway?  Steel won't rust under the Bondo.... Larry----- Original Message 
>>----- From: brett cooke To: Indiana_Red@hotmail.com ; 
>>scirocco-l@scirocco.org Sent: Thursday, January 16, 2003 5:13 PMSubject: 
>>Re: semi OT - Lame bodywork question
>>if you paint with por-15 first, let it dry, then sand it a lil' (just to
>>scuff it up) you should be able to bondo right over it. i've done this
>>before with no bondo adhesion problems. hth
>>   hit
>>
>>
>>
>>So Sayeth The Hitman
>>'88 "stripe" 16v scirocco
>>'91 passat gl "the green hell"
>><http://www.techography.net:82/brettsgarage>
>>
>>
>>
>>
>>
>> >From: "Ken B" <Indiana_Red@hotmail.com>
>> >To: <scirocco-l@scirocco.org>
>> >Subject: semi OT - Lame bodywork question
>> >Date: Thu, 16 Jan 2003 17:40:15 -0700
>> >
>> >As a rule, should filler (Bondo) go on bare metal only?  What if you 
>>wanted
>> >to rust proof a small section (Por 15) and fill over it a bit.   Taboo ?
>> >or
>> >OK?  Im thinking of the small holes at the lower corner of where my
>> >windshield sits.
>> >Thanks
>> >Ken
>> >1979 Scirocco 16V -  Almost done
>> >81 Deisel P/U - Rescued from neglegent PO
>> >VORTEX:  "Indiana Red"
>> >
>> >
>> >
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