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Re: Drywall compound faired molds
By:Shawn B
Date: 4/27/2000, 1:36 pm
In Response To: More Masonite Mold Making Musings (mike allen ---})

I used drywall fairing compound to fair my fiberglass seat mold. I sealed it really well with clear single-part polyurethane.

I'd be a tad concerned about the released boat pulling chunks of that stuff out of the mold, but a single ply of 4-oz. glass covering the entire mold, and then painted with tooling gelcoat would make a super durable mold.

Consider that the 4-oz. and tooling gelcoat will be more expensive than repairing the mold, but will also save a lot of time in the long run, especially if you build 3-4 boats.

Shawn

: I agree w/ both david and bart: the mold needs to be supported - by female
: forms.

: The joints need to be faired. What about using dry wall compound? cheap as
: hell and sands well. You should use the drywall 'tape' that is ACTUALLY
: f/g so that the jts are slightly reinforced. Use part of a plastic bottle
: as the scraper to make a constant radius fillet.

: the shiny surface needs to be sealed 1st to use a release. Probably any paint
: would work. And obviously paint the jts.

: For the foot bumps, cut ovals in the forms, and say drape burlap sacking (or
: any cloth - towel?) into the holes wetted out w/ major glue. Let set up
: and cover w/ torn newspaper dipped into white glue like paper mache. Sand
: flush and it may work. Maybe tape a blown up balloon very slightly
: protruding into the hole to set the burlap shape first. Use the drywall
: compound on irregularities.

: And when you'r done, you could actually stitch it together w/ some glass
: strands pulled from the 10oz cloth. Leave em in and then do the seams and
: they'll disappear.

: -mick

Messages In This Thread

I've got a dilemna
David Blodgett -- 4/24/2000, 10:23 pm
Re: How about MDO
Don Beale -- 4/26/2000, 10:14 am
Re: I've got a dilemna
Steve -- 4/25/2000, 7:19 pm
Re: I've got a dilemna
David Blodgett -- 4/25/2000, 7:45 pm
Re: I've got a dilemna
John B. -- 4/25/2000, 10:11 pm
maybe not such a dilemna
David Blodgett -- 4/25/2000, 11:07 pm
Masonite molds
David -- 4/26/2000, 7:48 am
Re: Masonite molds
Bart Castleberry -- 4/26/2000, 10:07 am
More Masonite Mold Making Musings
mike allen ---} -- 4/26/2000, 4:11 pm
Re: Drywall compound faired molds
Shawn B -- 4/27/2000, 1:36 pm
Re: More Masonite Mold Making Musings
Bart Castleberry -- 4/26/2000, 9:11 pm
Drywall Fairing Compound for Molds
mike allen ---} -- 4/27/2000, 11:35 am
Re: More
mike allen ---} -- 4/26/2000, 5:10 pm
More more
mike allen ---} -- 4/26/2000, 6:33 pm
Re: Masonite molds
David Blodgett -- 4/26/2000, 8:49 am
Re: Masonite molds
David -- 4/27/2000, 6:58 am
Re: Masonite molds
David Blodgett -- 4/27/2000, 8:37 am
Re: maybe not such a dilemna
Bart Castleberry -- 4/26/2000, 12:52 am
Re: maybe not such a dilemna
Bill H -- 4/25/2000, 11:11 pm
Re: I've got a dilemna
mike allen ---} -- 4/25/2000, 1:59 pm
Re: I've got a dilemna
Don Beale -- 4/25/2000, 12:35 am
Re: wallpaper paneling
Tom Kurth -- 4/24/2000, 11:10 pm
Re: the plywood is luaun
Tom Kurth -- 4/24/2000, 11:13 pm
Re: I've got a dilemna
Ross Leidy -- 4/24/2000, 10:55 pm