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The advice given on this site is based upon individual or quoted experience, yours may differ.
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Maybe someone can help me here? For some reason I decided to use some left over polyester resin on my keel after sanding down. I figured it would help seal the many exposed areas of metal. Well, I either did not add enough hardner or I simply had old/bad product.
The resin is still tacky after 2 1/2 days.
What should I do? What can I do? I've thought of adding a very "hot" mix of resin and painting it over this? No?
Let me start by saying I no longer use polyester resin except for gelcoat. What you have there is a fine example of one of the many reasons why I quit using it. Of the various polyester resins out there, some are intended for lay-up, a.k.a. laminating resins. Others are intended to produce the final hard exterior surface, such as gelcoat. Laminating resins are deliberately formulated <b><i>not</i></b> to harden quickly, thus encouraging a strong primary chemical bond between applications. It sounds like that's what you used. Now, one can use laminating resin to produce a hard finished surface by either adding 'surfacing wax' to the pot, or by applying PVA to the resin just after it has been applied. (<i>I think the long spelling is something like 'polyvinyl alcohol' -- industrial strength hair spray with a tint.</i>)
Now as for "<i>What should I do? What can I do?</i>" You could try mixing up another batch of whatever you've got there, and either stir in lots of surfacing wax, or coat it with PVA. What I assume you'd like to avoid is having to remove the mess you've got on your keel now. And no, I'd resist the temptation of "adding a very 'hot' mix of resin." you would likely end up with a suddenly coagulated lumpy, sticky mess on your keel if it didn't catch fire in the pot first.
I hope someone with more (and happier) polyester resin experience than me will add their suggestions as well.
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.