Use only a few drops of Alcohol to thin your epoxy. You only need a few drops to thin it enough to be 'painted on'

Heating it does the same thing: Makes it thinner to spread. But cuts the cure time in half.. make a 'double boiler' type thing: mix your epoxy in a mixing cup, held in a coffee cup of hot water.. Just becareful not to 'contaminate' your epoxy withh the water.