It's a non blushing epoxy. If your still concerned.... wipe it down with soapy water. The best stuff to remove the amine blush. after that....you can give a quick sand to give next layup a little tooth to hold on to. After the sanding, wipe with acetone. Should be ready for next layup. Epoxy tends to run and you'll get that on vertical surface...like stringer. You can thicken resin cabosil, etc. To give it a little thickness and minimize how much runs down. Just a little....kinda like syrup....honey consistency maybe to think. It's won't add much strength.... just to help control the resin from running to lowest point leaving the glass with too little resin. Aside from that....make sure stringers fit as flush as possible ... use braces to keep them square... add some weight to the tops to keep them against Hull.
Also, radius the top corners of the wood....glass doesn't like 90 degree bends. And for bottom where it meets Hull....you'll need a filer of some sort(not bondo) to create a radius from stringer to Hull. Plastic spoon is good enough of a radius.. you can use it as a tool.
As for epoxy itself....I'd mix it in a cup....(must be exact....VERY little wiggle room) then poor in a flat tray....little a paint tray. Epoxy gets hot...and in a cup the volume generates heat quick and you loose your pot. In the tray heat dissipates and pot lasts longer. Have a plan of attack as epoxy may too fast to do one whole side. It's possible. You gotta super quick and have a helper.
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