Mike,

I use the 205 hardner for most of my work, but like the 206 for sheeting & glass cloth because it gives me a little extra work time. Something not mentioned here (yet) was the safety of using resins. Although I've found West to be "safer" than most for toxicicty, it still can cause trouble with mis-use over the years. Wear gloves & keep it off your skin, do the normal ventilation thing, especially when laying up large panels. This stuff has less of an odor than others, but the fumes still aren't good for you. Another big one is sanding.... ANY resins are bad for you if ingested, especially if they're not fully cured. Please wear a GOOD dustmask when sanding, & give it plenty of time to cure. Not only will your body thank you, you're plane will look better too!

Good luck,
Bob