I use two types, one is envirotex and the other is Glaze Coat.
Setup: latex gloves, clear disposable plastic cups for measuring, brick, jumbo craft stick for mixing, hairdryer
Paintings:For the above panel painting ((17"x 24") I measured equal parts to fill 14 oz in a 16 oz plastic cup.
For my heart paintings (8"x11") I used equal parts to fill about half of a clear plastic cup (shown below) I balance the painting on a brick (two for larger one's). That way I can hold the paintings from the underside as I tilt it to get the resin to coat the whole painting and the excess drips off the sides. Once you have poured the resin the air bubbles start to come to the surface and you can either exhale on them or use a low setting on a hairdryer to get the bubbles out. It takes about 12 hours to stop being sticky, about 48 to really set. once it is set it is crystal clear. You need to do this in a ventilated area and when the weather is warm. I tried to do it in the garage in the fall with the doors open but the resin got too thick when mixing and it was harder to spread. In the summer the resin is nice and runny and easier to spread over the painting.