Hello!
I am new to this forum but been smithing for 5 years.
My gas forge has a few hot spots that show up during the initial light but then fade away once I’m up to heat. I have not had this happen before and I have just re-lined my propane forge. Also I have some odd looking rust spots that showed up this morning after working last night on the liner. Any ideas on what could cause that? Thank you in advance!