primer for fiberglass

pjoseph · 21st July 2009, 05:37 AM

I have built a sub box out of mdf I plan on coating the box with fiberglass to seal and to avoid the mdf from soaking up the paint.

can someone recommend a primer that will stick to fiberglass?

thanks

Ron E · 21st July 2009, 11:21 PM

It's much easier to put on a coat of Kilz or some primer that will work for the paint you want to use.

Bondo works for filling in screw holes, etc...

bobhowell · 1st August 2009, 01:53 AM

Fiberglass is a pain to work with but it is strong. If you brace well, you can get the needed strength otherwise, without the mess.

But then maybe you want to use fiberglass; and if so, many paints will stick. That will be no problem.

The real advantage with fiberglass is the many shapes you can form. You could make any shape out of paper mache and then cover it with fiberglass and have a sub. Let your imagination run wild. Mickey Mouse, pumpkin, girl friend, what ever.

Cal Weldon · 3rd August 2009, 09:55 PM

Are you planning to use cloth or just resin to do the sealing?

Arick · 3rd August 2009, 11:14 PM

Hi,
As funny as it may sound, one trick that may work is to use pantyhose. Some of us used it on balsa models to prevent over soaking the soft wood with paint. It will be much easier to finish than fiberglass.

Ron E · 4th August 2009, 12:03 AM

A tried and true sanding sealer and prep for painting MDF is coating with simple white glue.

21st July 2009, 05:37 AM	#1
pjoseph diyAudio Member Join Date: Jun 2004 Location: Secaucus	primer for fiberglass I have built a sub box out of mdf I plan on coating the box with fiberglass to seal and to avoid the mdf from soaking up the paint. can someone recommend a primer that will stick to fiberglass? thanks

21st July 2009, 11:21 PM	#2
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	It's much easier to put on a coat of Kilz or some primer that will work for the paint you want to use. Bondo works for filling in screw holes, etc... __________________ Science is a way of thinking much more than it is a body of knowledge. --Carl Sagan

3rd August 2009, 09:55 PM	#4
Cal Weldon diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	Are you planning to use cloth or just resin to do the sealing? __________________ Read dozens of books about heroes and crooks and I learned much from both of their styles. (JB)

4th August 2009, 12:03 AM	#6
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	A tried and true sanding sealer and prep for painting MDF is coating with simple white glue. __________________ Science is a way of thinking much more than it is a body of knowledge. --Carl Sagan

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1st August 2009, 01:53 AM	#3
bobhowell diyAudio Member Join Date: Dec 2008	Fiberglass is a pain to work with but it is strong. If you brace well, you can get the needed strength otherwise, without the mess. But then maybe you want to use fiberglass; and if so, many paints will stick. That will be no problem. The real advantage with fiberglass is the many shapes you can form. You could make any shape out of paper mache and then cover it with fiberglass and have a sub. Let your imagination run wild. Mickey Mouse, pumpkin, girl friend, what ever.

3rd August 2009, 11:14 PM	#5
Arick diyAudio Member Join Date: Dec 2008	Hi, As funny as it may sound, one trick that may work is to use pantyhose. Some of us used it on balsa models to prevent over soaking the soft wood with paint. It will be much easier to finish than fiberglass.

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