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-   -   is thick fiberglass a bad thing? (http://www.hotrodders.com/forum/thick-fiberglass-bad-thing-226004.html)

lukeembry 11-12-2012 09:41 AM

is thick fiberglass a bad thing?
 
long story short, replaced qtrs in my 70 dart. where i welded them in caused warp. i used short strand fiberglass to strengthen the thin keystone qtrs and fill the warped areas. in one spot (3"x4" area) its 3/4" deep counting the mud on top. whats your opinion on this holding up? thanks
also whats a good way to strengthen thin sheet metal?

NEW INTERIORS 11-12-2012 09:46 AM

Quote:

Originally Posted by lukeembry (Post 1610297)
long story short, replaced qtrs in my 70 dart. where i welded them in caused warp. i used short strand fiberglass to strengthen the thin keystone qtrs and fill the warped areas. in one spot (3"x4" area) its 3/4" deep counting the mud on top. whats your opinion on this holding up? thanks
also whats a good way to strengthen thin sheet metal?

The short strand bondo holds up well when put on right.. Why didn't you try hammering some of it out ?

lukeembry 11-12-2012 09:52 AM

Quote:

Originally Posted by NEW INTERIORS (Post 1610299)
The short strand bondo holds up well when put on right.. Why didn't you try hammering some of it out ?

actually i did pull it out and finish the work but the longer it sits in the sun the more i could see a dent in that spot, i figure the area is stretched and without shrinking or leaving the dented area i will never get the panel to stay straight. the entire build is done and in paint so trying to fix with out making a huge mess.

NEW INTERIORS 11-12-2012 09:54 AM

Quote:

Originally Posted by lukeembry (Post 1610301)
actually i did pull it out and finish the work but the longer it sits in the sun the more i could see a dent in that spot, i figure the area is stretched and without shrinking or leaving the dented area i will never get the panel to stay straight. the entire build is done and in paint so trying to fix with out making a huge mess.

I understand..;)

poncho62 11-12-2012 09:57 AM

3/4" is a ton of filler. Personally, I would be redoing the whole thing

69 widetrack 11-12-2012 10:08 AM

Quote:

Originally Posted by lukeembry (Post 1610297)
long story short, replaced qtrs in my 70 dart. where i welded them in caused warp. i used short strand fiberglass to strengthen the thin keystone qtrs and fill the warped areas. in one spot (3"x4" area) its 3/4" deep counting the mud on top. whats your opinion on this holding up? thanks
also whats a good way to strengthen thin sheet metal?

3/4 of an inch is rather thick. The thicker the filler or fiberglass the more easily it will not stay on over time, if the car gets tapped near the fiberglass/filler repair. Depending on the product you used the thickness should not be over 1/4 inch and I think that's a bit thick.

I don't know how you welded the quarters on but a safe way is to stitch weld them...one bead at a time allowing the small weld to cool while welding at a spot further away from the original weld. This will minimize warpage.

If the panel does warp, you can use a body hammer to try and straighten the warped area, I prefer, either stretching or shrinking the metal to bring it back to it's original, I could explain but this site will give you all the information and he's already written it out:

Ferguson Coachbuilding

Hope this is what you where looking for

Ray

OneMoreTime 11-12-2012 10:12 AM

Getting that metal shrunk is just part of a collision repair or restoration soooo...remove the thick glass and do it over..you will thank yourself later..

Sam


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