stripping Gel Coat

Wally6800

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Joined
Mar 7, 2014
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2
Besides woodworking, I enjoy restoring fiberglass boats.

I have a 1965 Boston Whaler that I am refinishing. I have removed the Gel Coat from the flat surfaces using a special tool that looks like a rotary sander but the disk is fitted with 3 carbide inserts that very quickly remove 95% of the Gel Coat. (About 1 1/2 sq. feet per minute).

I need to sand these areas to finish the Gel Coat removal before I begin to rebuild these  surfaces.

There are curved surfaces where my special tool can not be used. I will have to sand these surfaces to remove the Gel Coat.

My plan is to use a RO90 sander and a  HEPA 26 Dust Collector.

I have looked at your abrasive guide. I can understand the suggestions when using the tools for wood. I need suggestions for working on fiberglass.  The finest grit I will need on any of this preparation work will be 80 grit.

Can some one please suggest the  type of abrasives  and grit schedule that I would need  to remove the remaining Gel Coat from this boat. 

Thank you,

Walter Luikey

P.S. I started using Festools about 7 months ago. I built a new pilot seat and console for this Whaler project out in my driveway because I did not have a dust collector. The neighbors found this to be a great source of entertainment  and frequently gathered  for hours  asking questions and watching the work progress.  When the work was finally completed I was overwhelmed  by the complements that your tools received. The comment I liked the most was from a fellow that has a workshop that would put most professional shops to shame. He said," It would have taken me three times as long to build those pieces in my shop and I never could approach the quality of the construction that you achieved using your TS75, a small drill press and a router, and you did it outside in your driveway!!  WOW!!!!!".
 
used to 90&150 with granat 80,120,150 grits .worked out great.you will smell fiberglass every time you use that bag,had to change it early.smell stayed in the bag,not the vac( ct26)
 
John,
Thank you very much for the quick response.

With those recommendations, do you have any idea how much faster a 60 grit disk would cut the Gel Coat  than the 80 grit?

Thanks.

Wally
 
1/3 I guess,I didnt want to go very far down,so I started with 80 once over, real fast,acting like a wire brush.100 didnt goes fast enough, switched to 120,left it a little rough,so I hit it with 150,smooth it out to coat.
 
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