Greg,

I remember that incident, you posted some pics of the blistering I think.

I've also learned that it is paramount to get the order if chemicals right as you lay up the finish. What the KK engineer mentioned sound right to me - basically a solvent based CC (Krylon) was used under another chemical based layer (epoxy paint). I think that if the bedding CC had been allowed to cure for a week and then sealed with a primer sealer you might have had no problems. The KK primer would then gave been a thin coat under the actual paint. However, in short, the key is to use a "low reactivity" layer under other reactive layers.

The beauty with water borne products is that once dry they don't outgas. Jeff finished his Aurora using Polycrilic for the glassing and Auto-Air primers and paint so I'm quite confident that that particular combination works. In particular they are both water borne acrylics so cross-reactivity shouldn't be an issue.

David also used Polycrilic to bed the glass on his BA although I don't recall what paints he used but it shouldn't really matter atop polycrilic. Where I have concerns is when top coat urethanes are used for glassing. One can put urethanes atop just about anything but the converse is not true.

The main disadvantage of polycrilic is that it is not as hard as epoxy resin but it offers other advantages.

In any case well see what kind of a mess I end up with when I try it...

David