I saw some water based epoxy clear in Bunnings today.. wouldn't mind trying it out and seeing how it sprays etc.
Id like to be proven wrong but so far my experience with new water based over oil and solvent based products hasn't been good. If there are any commercial painters on the forum, it would be nice to know if they use the water based enamels for wood trim etc... my guess is no as I just couldn't get a nice finish with them.