after a run was cleaning my aux lights but the bottom of the cloth touched the header pipe and burnt onto it leaving a hard mess which is proving impossible to remove - any ideas? i've tried brushing, washing, petrol, wonder wheels ????
If it was a plasticised type cloth like a Jey Cloth then try using a craft knife blade on it while its cold to scrape it off.
Or use a hot air gun to get it slightly soft and 'peel' it off.
On stainless headers you can use Autosol and a dish scourer pad.