[jonesg]

No I'm not John Wills, I found his books on "aircraft spruce and supply" when I was ordering glass cloth.

I notice from reading the contents list from seacast it almost reads as if they don't want you to know whats really in it. It doesn't list DMA but it has to be in there or the resin simply will not work. NA will not work with BPO.

Seacast is a great product though, I wouldn't hesitate to recommend it, I just like making things myself.

The only occurance of cracking is some guy tried to make a jackplate from seacast, thats a misapplication methinks.

Will's book has some funny recipes, poor mans parting film can be made by dissolving old movie reels in acetone, thats how they used to make it and why it had a blue green tint.
Todays concoctions are tinted with dye to simulate the old method.