Blending FG to the MDF

Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=71572
Printed Date: May 04, 2024 at 11:57 PM

Topic: Blending FG to the MDF

Posted By: IKESSKY
Subject: Blending FG to the MDF
Date Posted: January 26, 2006 at 4:29 PM

After countless hours of reading, I'm finally ready to start on some fiberglassing projects. One thing still puzzles me, but maybe I'm just thinking about it too hard. When making an encloser or any other piece that has a large flat spot, MDF should be used. Now, after the fleece has been stretched around the piece and fastened to the back of the MDF, won't there be a "high spot"? I guess what I am getting at is the fact that if you put a level across the piece of MDF, the FG portion will not allow the part to sit level on a flat surface. What is done to correct this?

Replies:

Posted By: tcbturbosux
Date Posted: January 26, 2006 at 4:53 PM

Say yo' if you raised up your speaker ring then you shouldnt have any flat spots.Can you elaborate a little more on the prob.

Uncle gumby

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Uncle Gumby

Posted By: lmonroejr
Date Posted: January 26, 2006 at 8:47 PM

You need to use your router. Use a rabbit bit (?). Router around the edges, this will give you a place to staple your fleece. Then you just need to bring the lower edge up to the top edge by using the fiberglass and resin. Larry Jr

Posted By: IKESSKY
Date Posted: January 26, 2006 at 10:31 PM

https://img.photobucket.com/albums/v697/ikessky/FG.jpg

Please excuse the crude Paint image! This is a rough idea of what I am talking about. The MDF would be sitting on a flat surface. The uneven ledges where the FG and the MDF "meet" would cause a gap between the MDF and the surface it sat on. How does one get away from that?

Posted By: placid warrior
Date Posted: January 26, 2006 at 11:37 PM

like Imonroejr said, use a router bit to rabbit (or whatever its called) the edges, its a 90deg indent on the edge so u can attach the fleece and then blend it in.
posted_image

Posted By: IKESSKY
Date Posted: January 27, 2006 at 6:50 AM

Excellent. Thank you guys very much. I'm also assuming I will need to add some FG to the inside seam to safeguard against air leaks and to add some strenth.

Posted By: placid warrior
Date Posted: January 27, 2006 at 1:23 PM

yea its a goo idea to reinforce the seams when starting out cause half the time not enough resin gets put on to soak through the fleece.

Posted By: HottAccord
Date Posted: January 27, 2006 at 5:23 PM

Placid Warrior has the idea...I learned it a little differently from Glassmans DVD's. You route out the top edge, so that the fleece can be stapled right into the groove. You will then have a little space above the fleece to add body filler and make the whole fleece & mdf flush. I hope this pic helps illustrate my point.

posted_image

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Im a fiberglass whore!!