"So, I mix well and then immediately separate off the likely excess in a quite shallow dish so it does not cook off." D. Carlson.
Fellas, I'd reread the good Doctor on this one.
Uhh...yeah - that too!
Well.. With the cost of west System ,I would never mix more than I needed, therefore taking off the excess is not an option. Once I know I have excess(usually scraped off of the project), it's too late. I've tried saving it by cooling it and it has never worked for me . Slowed it down, but still gelled within 20 minutes. I would think if there was a way to save extra, some of the boatshops I worked for would have used the technique.
Todd