i did a lot of research into what to use a while back in this post , i was concerned about using acylic paint as i have no idea what paint was made from i rung a scientist at resene he couldnt garentee it wouldnt leach out over time he said most acylic paint now is low VOC so may be alrite but suggested tessting it with cheap fish(i didnt like that idea), a few other reps i spoke to told me not to use their products unless i wanted chips with my fish (these were various poly paints and some epoxies) . i spoke about the low VOC paint to 1 rep who told me its used on roofs that are used to collect rainwater for drinking, i reminded him that 20 years ago lead paint was used for the same thing. rockwork i think this goes to show no amount of researech can beat experience i certainly think household paint is a lot easier to apply than epoxy