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cracking/crazing treatment

Unread postby rjsdotorg on Wed Feb 14, 2018 7:00 pm

Now underway.
I belt sanded the crazed gelcoat (the whole stripe) with a 4" x 24" belt sander and 36 grit.
Rinsed and wiped dry.
Now applying 1.5oz glass cloth 18" wide around the whole rig. The stuff is thin as silk and still should prevent later crack print-through in the marine paint.
IMG_5374.JPG

I thinned the resin ~5% and brushed from the centers of the cloth outward (it's been a while since doing glass).
I tried brushing the surface first then laying on the cloth and it didn't go well; just tack the cloth up with tape or a spritz of spray adhesive and brush it on top.
Not worried about wrinkles etc as they'll sand off and this is only about the fine cracks.
After spreading the resin, hard, the thickness is ~1mm.
2oz would be fine too. There is 3/4oz available but that would be crazy to work with.
IMG_5375.JPG


You can see the ribs in the right light, and the whole thing is wavy, so absolute flatness is actually not desired.
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rjsdotorg
Contributing Member
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Posts: 63
Joined: Sun Dec 24, 2017 1:37 pm
Travco Model: 1972 270

Re: cracking/crazing treatment

Unread postby rjsdotorg on Wed Feb 14, 2018 7:03 pm

Also did the center joint delete, with 6oz glass5" wide.
Still needs fairing, as will the side stripe.
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rjsdotorg
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Posts: 63
Joined: Sun Dec 24, 2017 1:37 pm
Travco Model: 1972 270


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