If you use epoxy, you can also thin it, so it will brush on smoother. If I was doing it, I would use a 15 minute epoxy, and add a few drops of lacquer thinner, and brush it on as smooth as possible, using an epoxy brush (also sold as Flux brushes) at the local hardwear store. 
The reason I would use the 15 minute stuff, is it allows more time to mix the thinner in, and brush it on, and place the epoxy 
zimmerit correctly. 
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