Ken gave you some good advice. I've seen to many gooey messes when people tried to thin the epoxy, especially with medicinal alcohol. There is also a "finishing epoxy" available which is quite a bit thinner (flows and brushes easily) that you can use. Heat and slow epoxy (30 minute or slower) works best and always gives good results. It is best to heat it after application, not in the mix pot. It also helps to have the surfaces being painted warm prior to application.