how far to grind?

[Sangster21]

I have my boat gutted, stringers wrestled out and started grinding. I will post pics tomorrow when I get my camera back. How much do I need to grind to replace stringers? Do I aim to remove all of the original tabbing or just grind to clean well bonded fiberglass? The boat is a 21 ft Sangster hardtop.
Thanks,
Alan

 

[ShellBack89]

Re: how far to grind?

Grind away the old stuff. You'll see a noticeable color change when you are at the sweet spot. Vacuum and give a good washout. You can look at frisco thread or I have a decent washout out on my thread. Good luck & welcome to dry dock.

 

[Friscoboater]

Re: how far to grind?

If you see daylight you have gone too far... JK... You are just looking for a color change and to make sure it is good and clean. You need to make sure and get every inch of the hull.

 

[Bumperlt12]

Re: how far to grind?

On my sea ray is was pretty obvious when you got to the original hull. I grinded down til there was no more glue or dry fiberglass. Really I tried to get to the hull in most spots.