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Best way to clean fiberglass

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doug.medema(at)comcast.ne
Guest

Posted: Tue May 29, 2007 1:49 pm Post subject: Best way to clean fiberglass

All right all you painter types:

  

 What is the best way to clean fiberglass before priming

 and between cycles of PPG K38 followed by sanding?

 Soap & water?  Rubbing alcohol? One of the special

 antistatic cleaners from Dupont or SW? Something else?

  

 I've heard bad things about using acetone - I understand

 it soaks into the resin and dries very slowly.

  

 Thanks,

 Doug Medema

 RV-6A N276DM -- finally painting (1st flight 11/2003!)

  [quote][b]

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n616tb(at)btsapps.com
Guest

Posted: Tue May 29, 2007 2:14 pm Post subject: Best way to clean fiberglass

I haven’t used it yet but I purchased Acryli-Clean DX330 also by ppg.  

   

Tim  

           

  

From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of doug.medema(at)comcast.net

 Sent: Tuesday, May 29, 2007 4:48 PM

 To: rv-list(at)matronics.com

 Subject: Best way to clean fiberglass  

  

     

All right all you painter types:  

    

   

    

What is the best way to clean fiberglass before priming  

    

and between cycles of PPG K38 followed by sanding?  

    

Soap & water?  Rubbing alcohol? One of the special  

    

antistatic cleaners from Dupont or SW? Something else?  

    

   

    

I've heard bad things about using acetone - I understand  

    

it soaks into the resin and dries very slowly.  

    

   

    

Thanks,  

    

Doug Medema  

    

RV-6A N276DM -- finally painting (1st flight 11/2003!)  

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       [quote][b]

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Bruce(at)glasair.org
Guest

Posted: Tue May 29, 2007 2:24 pm Post subject: Best way to clean fiberglass

Contrary to  what you've heard, acetone is still the best cleaner. It dries very fast and  doesn't soak into cured fiberglass lay-ups. Been there and done that, many, many  times.

  

  

 

Bruce

www.glasair.org

   [quote]   

   --

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Bruce(at)glasair.org
Guest

Posted: Tue May 29, 2007 2:36 pm Post subject: Best way to clean fiberglass

After  cleaning bare fiberglass with acetone, then after your first coat of primer, use  whatever cleaning solvent recommended by your primer  manufacturer.

  

  

 

Bruce

www.glasair.org

   [quote]   

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pitts_pilot(at)bellsouth.
Guest

Posted: Tue May 29, 2007 7:33 pm Post subject: Best way to clean fiberglass

Actually, if you're using polyester resin, the acetone will clean and soften just the surface a little, which helps the paint stick a little better.  Acetone won't do squat to epoxy resins. At least in my experience. Alcohol might be a better cleaner on the epoxies, but I don't have experience there.   But to answer you question, I use MEK and Acetone for cleaning almost everything.

 Linn

 do not archive

 

 doug.medema(at)comcast.net (doug.medema(at)comcast.net) wrote:

 [quote]   All right all you painter types:

    

   What is the best way to clean fiberglass before priming

   and between cycles of PPG K38 followed by sanding?

   Soap & water?  Rubbing alcohol? One of the special

   antistatic cleaners from Dupont or SW? Something else?

    

   I've heard bad things about using acetone - I understand

   it soaks into the resin and dries very slowly.

    

   Thanks,

   Doug Medema

   RV-6A N276DM -- finally painting (1st flight 11/2003!)

    	  Quote: 	
		  

	
 [b]

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truflite(at)yahoo.com
Guest

Posted: Tue May 29, 2007 8:36 pm Post subject: Best way to clean fiberglass

 	  Quote: 	
		  From my RC modeling experience, I have used alcohol

for all cleaning of finished parts. Epoxy always

leaves a thin film of oil when cured.  Alcohol does a

good job of removing it.  For paint adhesion, sand

with 600 or finer and clean again with alcohol.  I

just use the cheap rubbing alcohol from the aviation

aisle at the local drug store.

I worked for a friend for a while and his business was

making fiberglass cowls for model aircraft.  He tried

polyester at first and switched to epoxy.  The

polyester is always curing, always.  In time, it

becomes very brittle and will craze and the piece will

look like a smashed windshield.  Epoxy seems to retain

some flexibility or give.

I don't know why people still use polyester due to its

brittle tendencies.  Maybe technology has improved it

since I used it.  That said, I will take epoxy every

chance possible.

Dave

--- linn Walters <pitts_pilot(at)bellsouth.net> wrote:

 	  Quote: 	
		   Actually, if you're using polyester resin, the

 acetone will clean and 

 soften just the surface a little, which helps the

 paint stick a little 

 better.  Acetone won't do squat to epoxy resins. At

 least in my 

 experience. Alcohol might be a better cleaner on the

 epoxies, but I 

 don't have experience there.   But to answer you

 question, I use MEK and 

 Acetone for cleaning almost everything.

 Linn

 do not archive

 doug.medema(at)comcast.net wrote:

 > All right all you painter types:

 >  

 > What is the best way to clean fiberglass before

 priming

 > and between cycles of PPG K38 followed by sanding?

 > Soap & water?  Rubbing alcohol? One of the special

 > antistatic cleaners from Dupont or SW? Something

 else?

 >  

 > I've heard bad things about using acetone - I

 understand

 > it soaks into the resin and dries very slowly.

 >  

 > Thanks,

 > Doug Medema

 > RV-6A N276DM -- finally painting (1st flight

 11/2003!)

 >

 >

 >

 >

 >

http://new.toolbar.yahoo.com/toolbar/features/mail/index.php

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