Greetings Soap Friends, I purchased some gallon jugs of coconut oil and palm oil. They are solid. What is the best way to get them into liquid form for CP soap making? Microwave? Immerse in hot water? Something else? Thank you!

You might even be able to leave them sitting on the roof of your car on a warm, sunny day. When that isn't an option, I usually fill one side of the sink with hot water and just wait for it to liquify enough to pour out.
I was going to suggest that, but the OP is in Michigan, not in Alabama like us! We had temps of 88 degrees last week.
I poured the melted oils into other smaller containers. I saw no reason to have to keep melting the whole batch over and over. Home Depot sells lids for their pint and quart paint mixing containers, but old lard buckets, or other things will work too.