Came across a plane from an estate sale and the engine is seized solid. The plane hasn't ran for several years. It appears to be a .46 but Ihaven't taken it apart to verify.

Anyone have any ideas on how to unseize? Soak in a cleaner? Heat up? Take apart? Put some oil through the carb then let it sit for awhile? The pilot was very meticulous so I'm sure he took care of it while alive, may he rest in peace. Other planes were not seized. His collection has sat for at least two years.

Appreciate the help.