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Unread 08-28-2011, 01:55 AM   #1
cmburrell
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Fiberglass Hardtop

I have a decent crack in my hard top I'd like to fix it and repaint my hardtop. Its black now and not in bad shape at all except for the crack. I have no experience with fiberglass repair. How difficult is it and any suggestions on how going about doing it. My only real wonder is how to sand it.

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Unread 08-28-2011, 07:52 AM   #2
jcal73
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You might have to sand the whole top to get it to look good.

Here is a page of a guy rebuilding an ACME top. The principals are the same.

http://www.manoian.net/jeep/acme_hardtop.html

Hope that helps,
Jeff
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Unread 08-28-2011, 11:37 AM   #3
Cutlass327
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Also look in my "Fiberglas Tub Modification" thread. there are some tips there on basic fiberglass work, also a link to Skerr's thread on his son's build, where they are doing a bunch of 'glass work. These tips are more of the generalized how-to for 'glass, but you can adapt it to the HT. Especially in Skerr's thread, where they are doing the hood.

http://www.jeepforum.com/forum/f8/fi...-easy-1246228/

Where they start getting into the hood:

http://www.jeepforum.com/forum/f8/cl...7/index32.html
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1978 CJ5 258/T177/D300, '86 D30/D44 WT axles, 'glass tub windshield frame, and fenders, 31x10.5 BFG A/T, TDK galv'd frame - DD and weekend toy

http://www.jeepforum.com/forum/f8/ri...8-cj5-1223197/
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Unread 08-28-2011, 02:25 PM   #4
Dkilby95
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i'd get some cats hair fiberglass, put that on the crack and then sand it down to flat
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Unread 08-28-2011, 04:34 PM   #5
Mike Romain
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How bad and where is the crack?

My stock top is an eggshell finish, so a fill and sand will show.

if the crack is structural, then grinding it out in a wide V shape and putting thin layers in is the best. For 1/8" deep grind, you need about 1 1/4" wide shallow V, then you use a 1/4" strip to start and a 3/4-1" top strip.

I would then sand it a bit low and use a roller or sponge to try and get some eggshell finish with primer before painting to match.
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Unread 08-29-2011, 08:02 PM   #6
cmburrell
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Quote:
Originally Posted by jcal73 View Post
You might have to sand the whole top to get it to look good.

Here is a page of a guy rebuilding an ACME top. The principals are the same.

http://www.manoian.net/jeep/acme_hardtop.html

Hope that helps,
Jeff
Thanks Jeff the link really gave me a lot of useful info
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Unread 08-29-2011, 08:02 PM   #7
cmburrell
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Quote:
Originally Posted by Cutlass327 View Post
Also look in my "Fiberglas Tub Modification" thread. there are some tips there on basic fiberglass work, also a link to Skerr's thread on his son's build, where they are doing a bunch of 'glass work. These tips are more of the generalized how-to for 'glass, but you can adapt it to the HT. Especially in Skerr's thread, where they are doing the hood.

http://www.jeepforum.com/forum/f8/fi...-easy-1246228/

Where they start getting into the hood:

http://www.jeepforum.com/forum/f8/cl...7/index32.html
Thanks the thread was very interesting. I love how you did the gas filler.
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Unread 08-29-2011, 08:05 PM   #8
cmburrell
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Quote:
Originally Posted by Mike Romain View Post
How bad and where is the crack?

My stock top is an eggshell finish, so a fill and sand will show.

if the crack is structural, then grinding it out in a wide V shape and putting thin layers in is the best. For 1/8" deep grind, you need about 1 1/4" wide shallow V, then you use a 1/4" strip to start and a 3/4-1" top strip.

I would then sand it a bit low and use a roller or sponge to try and get some eggshell finish with primer before painting to match.
The crack is right above the passenger side door starting at the drip edge traveling up about 4 to 5 inches. I also plan on painting the entire top afterwards so Im going to sand the whole thing and remove the original finish but I'm wondering what I should go back with do you suggest eggshell.
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Unread 08-29-2011, 08:39 PM   #9
Dborns
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The hardtop I bought had cracks below both side windows that were held together by metal strapping. Without any previous fiberglass work, I was able to fix it so that you can't even tell there was damage to the top. I sanded the damage down about 4" around the damaged area, and a little more at the crack itself. Be careful with the sanding disc, as it can get out of hand pretty easy. I then used fiberglass mat and fibers according to the instructions to fix the area. Its easy but messy. I painted the whole top with RustOleum black. Good luck.
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Unread 08-29-2011, 09:50 PM   #10
cmburrell
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Thanks the project will start tomorrow with the sanding based on all the info I've gotten I feel pretty good about it.
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Unread 08-30-2011, 01:35 AM   #11
Cutlass327
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Quote:
Originally Posted by cmburrell View Post
Thanks the thread was very interesting. I love how you did the gas filler.
FYI - I think you were thinking of Clay's thread on the gas filler - mine's always been the stock style..
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1978 CJ5 258/T177/D300, '86 D30/D44 WT axles, 'glass tub windshield frame, and fenders, 31x10.5 BFG A/T, TDK galv'd frame - DD and weekend toy

http://www.jeepforum.com/forum/f8/ri...8-cj5-1223197/
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