You need to use a 50/50 mix of resin to hardener. If you didn't use enough hardener, you need to scrape it off, and start over.

it will set up eventually if the mix was reasonably close. Give it 24 hours before scraping. Humidity and temperature can do all kinds of things to cure time. 2 hour or longer cure time epoxies are most affected.

If the epoxy starts to get stiff but doesn't seem to quit being tacky, a thinned application of another layer will often kick it off the rest of the way. (only after waiting, and being certain its holding the load, just not tack free.)

After waiting, if its not stiffening up on its own... you will have to go ahead and scrape, but its a bad deal, because there will be "nevercured" epoxy down in the wood grain, where some of the strength of the bond is supposed to be.

If I have epxoy that isn't setting up I place it in the car, roll the windows up and park it in the sunshine! Does miracles [img]i/expressions/face-icon-small-smile.gif[/img]

Jerry

A heat gun or hair dryer too! jsut don't burn anything. the idea is to heat up the glue to speed curing, not cook it.. It might get a bit runny though..

If worst comes to worst, I have used acetone to clean up the uncured epoxy (after trying a month, heat guns, etc.) Use gloves and a rag to remove the old epoxy. Douse the rag with acetone and scrub!

Years ago I had the same problem and used a heat lamp overnight and it finally set up. WARNING... heat and fuel,, with oxygen will make a nice fire.. The plane will burn,,, Adjust the lights to control the heat and monitor it.. Jim

This worked for me. I once had a coat of epoxy that did not cure, I mixed up a new batch paying attention to mix ratios and put it on over the old uncured. Everything then cured okay, just took a couple of days instead of a couple of hours. Seems that once you get the chemical reaction started, it tends to continue into the improperly mixed part. Heat (not enough to make it bubble, just hot to the touch) speeded things up.