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fix crack in fg


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menace2sobriety 
Silver - Posts: 394
Silver spacespace
Joined: October 29, 2005
Location: United States
Posted: January 31, 2006 at 8:37 PM / IP Logged  

can any one tell me what is the best way to fix a crack in fg,? its a body kit for a car its got a 4 inch long crack in it..

thanks.

downstarinc 
Copper - Posts: 119
Copper spacespace
Joined: October 22, 2005
Location: United States
Posted: January 31, 2006 at 8:44 PM / IP Logged  
fiberglass over the crack...
jl audio..nuff said
wickedcustoms 
Member - Posts: 6
Member spacespace
Joined: January 24, 2006
Location: United States
Posted: January 31, 2006 at 8:48 PM / IP Logged  

Take the body kit off. On the back side of the body kit where the crack is at lay some fiberglass mat at least 2 layers. let this dry. on the outside of the body kit take some sand paper and sand the area where it's cracked at just to Roughen it up then take some body filler to smooth out the craked area follow with some rage gold. Then primeand paint.

Hope this helps you.

gavin9797 
Copper - Posts: 106
Copper spacespace
Joined: April 26, 2005
Location: Canada
Posted: January 31, 2006 at 9:55 PM / IP Logged  

Take off the damaged piece. See if you can find the crack on the underside, if you can V-groove the crack then lightly grind the perimeter of the crack. Get a 2 part epoxy (preferably 3M 8115, or proform) make sure it is a structural adehesive....not a finishing putty. As well get some backing mesh. Fill the crack with the glue spread out evenly, then lay backing cloth and put some more glue over top and spead evenly again. After this cures (3M 5 min cure with a heat gun (just don't hold in one spot..move the gun around.) Flip over and V out the crack on top. Fill with putty and spread out. (DO NOT PUT CLOTH ON TOP SIDE OF PANEL) Block sand and refinish as desired.

***where latex or nitrile gloves, this work is messy!***

If crack is not all the way through the back side, just do the second step of this procedure.

Hope this helps (and all makes sense)

If you only grind the flat surface and fill over top of the crack, the first time that piece flexes it will crack again.

menace2sobriety 
Silver - Posts: 394
Silver spacespace
Joined: October 29, 2005
Location: United States
Posted: February 01, 2006 at 12:41 AM / IP Logged  

hey thanx for all the help yep makes sense. will do, also after that would it help to epoxy a flat metal strap on the back side help keep it rigid. i dont think it would hurt. i live in spokane wash. and the roads are horrable with pot holes and rough pavement.

gavin9797 
Copper - Posts: 106
Copper spacespace
Joined: April 26, 2005
Location: Canada
Posted: February 01, 2006 at 5:42 PM / IP Logged  
I do not know if it is necessary. I live in Calgary Alberta so our weather conditions are fairly similar. Remember that metal and fiberglass expand and contract differently so it may be more of a hinderance. As well the metal might make it to rigid and it might become more suceptable to cracking.

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