I need help finding this fic. It's where Dean is an artist and he does mixed media(I think), but he owns this old firehouse
I think what you’re looking for is:
Painted Angels by: winnjenster (e, 105.6k)
Author Castiel Novak has finally hit the big time, with a book based on his failed college relationship with a brilliant painter. He’s put all his pain behind him, but at a book signing, he comes face to face with Dean Winchester for the first time in twelve years, and the reunion doesn’t go like Cas hoped. Dean’s a broken man, with a lot of scars and secrets, shoulders weighed down by his demons and self loathing.Cas sees a second chance with the man he’s never stopped loving, but Dean’s moved on, and is about to get married. Sam launches a “brilliant” plan to reunite his brother and his best friend, but Cas is worried it will all blow up in their faces, and he’ll go through the agony of losing Dean a second time.
If not, let me know! Happy reading!