Evoporusted the tank washed with water and air compressed all water out. Hang it up sideways for a few hours. Third time doing this and never had a issue.
Filled with gas, drained and filled with gas again and drained. I seem to still have some separation. Water possiblely sinking to bottom after three gallons of gas passed threw? It will run clean for a while but once I stop Petcock and start in a few hours the separation happens.