how much sanding off epoxy spills before 1st layer of epoxy?

Fiberglassing over plywood and one-off fiberglass methods. See: "Boatbuilding Methods", in the left-hand column of the Home page.

Moderator: ttownshaw

Yakima
Posts: 11
Joined: Sat Oct 25, 2014 6:29 am

how much sanding off epoxy spills before 1st layer of epoxy?

Postby Yakima » Mon Jul 18, 2016 8:51 am

As you might imagine, I have drips and spots of cured epoxy on the final planks. Do I need to sand that off- more than just smooth it- before rolling on the first layer of epoxy? In other words, will those drips and spots show thru the epoxy?

I have sanded it all nice and smooth, but you can still see where the epoxy ran or dripped when installing the final planks.


thanks!

-Greg

User avatar
Roberta
Posts: 5804
Joined: Tue Jul 31, 2007 5:23 pm
Location: East Troy, Wisconsin

Re: how much sanding off epoxy spills before 1st layer of epoxy?

Postby Roberta » Mon Jul 18, 2016 9:46 am

As long as you have scuffed the surface of the epoxy and cleaned up any amine blush, you will be fine. Scuffing the epoxy will provide a mechanical bond.
Roberta "Queen of the Boat Builders"
Built Zip "Oliver IV", Super Spartan "Jimmy 70", and Torpedo "The Glen L".

User avatar
kens
Posts: 4346
Joined: Wed Nov 12, 2003 5:25 pm
Location: Coastal Georgia

Re: how much sanding off epoxy spills before 1st layer of epoxy?

Postby kens » Mon Jul 18, 2016 10:31 am

is it clear epoxy resin, or does it have fillers in it?
Measuring props with computerized and digital equipment is still subjective at best

Yakima
Posts: 11
Joined: Sat Oct 25, 2014 6:29 am

Re: how much sanding off epoxy spills before 1st layer of epoxy?

Postby Yakima » Mon Jul 18, 2016 11:05 am

clear.

thanks!

User avatar
vupilot
Posts: 3160
Joined: Wed Apr 15, 2009 7:36 am
Location: Indy
Contact:

Re: how much sanding off epoxy spills before 1st layer of epoxy?

Postby vupilot » Tue Jul 19, 2016 8:47 am

In my experience they will sometimes show through if not completely sanded away

User avatar
Roberta
Posts: 5804
Joined: Tue Jul 31, 2007 5:23 pm
Location: East Troy, Wisconsin

Re: how much sanding off epoxy spills before 1st layer of epoxy?

Postby Roberta » Tue Jul 19, 2016 9:03 am

Vupilot is right. If you are covering or painting the area it won't matter. If you intend for the area to be bright finished, then it needs to be sanded to bare wood to ensure a uniform color. Most hull interiors are covered in some way.
Roberta "Queen of the Boat Builders"
Built Zip "Oliver IV", Super Spartan "Jimmy 70", and Torpedo "The Glen L".


Return to “Fiberglass”

Who is online

Users browsing this forum: No registered users and 1 guest