Bodywork, Paint, Interior, Trim, & Wiring

discussions about bodywork, paint, interiors, trim, audio, electrical components, wiring, etc.

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rficalora
Rob Ficalora
Willis, TX
(2764 posts)

Registered:
10/24/2007 02:46PM

Main British Car:
'76 MGB w/CB front, Sebring rear, early metal dash Ford 302

authors avatar
refinishing fiberglass
Posted by: rficalora
Date: February 19, 2017 03:47PM

I am redoing a hard top. Sanded off the gelcoat to eliminate the vinyl grain look. The fiberglass below is full of pin holes. Will regular plastic filler get in those little holes to fill them? Or a way to thin it so it will? I could use glaze/spot putty, but there are probably 1000 of these little holes spread all over the top. would rather use something I can spread faster than a few holes at a time.

I put some primer on to make it easier to see the holes in the pic...
pin holes.jpg



Edited 1 time(s). Last edit at 02/19/2017 07:14PM by rficalora.


billymgb1000
bill gaulin
harrisville R.I.
(74 posts)

Registered:
11/30/2012 12:31AM

Main British Car:
1974 MGB V8 LS1 5.3

Re: refinishing fiberglass
Posted by: billymgb1000
Date: February 19, 2017 08:12PM

Hey Rob, when I did my hood scoop it also had those I used spot putty. Not the red but the newer green a lot easier sanding came out pretty good. Good luck.


Preform Resources
Dave Craddock
Redford,Michigan
(359 posts)

Registered:
12/20/2008 05:46PM

Main British Car:
72 MGB V6 3.4

Re: refinishing fiberglass
Posted by: Preform Resources
Date: February 21, 2017 09:55AM

Rob, use the polyester body putty/spot putty, it dries fast and sands nice, you can glaze the surface about a square foot at a time
with a 6" spreader moving back and forth over the holes otherwise they won't fill completely, the advantage is the poly dries up well and sands easily ,use a DA with 240 paper, like you said put it on THIN once you have the suface where you like it , I would seal it up with a good grade of epoxy primer like PPG shopline, then you can prime and bllock to perfection prior to painting.
Good luck
Dave
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rficalora
Rob Ficalora
Willis, TX
(2764 posts)

Registered:
10/24/2007 02:46PM

Main British Car:
'76 MGB w/CB front, Sebring rear, early metal dash Ford 302

authors avatar
Re: refinishing fiberglass
Posted by: rficalora
Date: February 21, 2017 10:45PM

Thanks Dave!


MG four six eight
Bill Jacobson
Wa state
(325 posts)

Registered:
10/23/2007 02:15AM

Main British Car:
73 MGB Buick 215, Eaton/GM supercharger

Re: refinishing fiberglass
Posted by: MG four six eight
Date: February 22, 2017 05:34AM

Rob,


When working with old fiber glass, I recommend sealing it with several layers of gel-coat before applying fillers. If you use fillers to fill the pin holes without the gel coat, it will look good initially however over time as it sits in the sun new bubbles/pin holes will appear.

When you apply the gel coat you will need to sand it between the coats like you would with primer/surfacer. The gel coat is kind of a PIA to sand, but sealing it with gel coat is the only way I've found that works for good long term results without surface issues. (been there, done that)!

Bill



Edited 2 time(s). Last edit at 02/22/2017 05:45AM by MG four six eight.


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1166 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: refinishing fiberglass
Posted by: ex-tyke
Date: February 22, 2017 09:16AM

Evercoat Feather Fill products have been recommended to me - spray on or spot glaze available..
[www.eastwood.com]


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