In the case of tough stains, follow these steps. Spills should be treated as quickly as possible. Firstly, sweep all dust and debris from the affected area. After this, mix a solution at five ounces of clear ammonia per gallon of hot water and then soak a hard foam mop in this mixture. Use the mop to then scrub the stain away.
Using this method will eliminate many types of stains without jeapardising the epoxy itself.