I have struggled to find something that will do a good job on cleaning my coated heddmans. I tried a product called "Never Dull" and it works GREAT! It comes in a tin and is comprised of almost rag-like pieces of cloth that are pre-soaked. This stuff cut right through the burned on oil, grease etc that were on my collectors after months of flogging, fixing leaks etc. Good stuff, thought I would share..