Hi! I took it upon myself (trying to be Jane like) to paint the inside of my front door. That is my metal front door. I used regular indoor paint, I think it was a semi gloss. Well it came out pretty good other than it cracked in the middle. I'm not sure if it was because I did it in the winter when the door was cold or if (most probable) I just didnt use the right paint. Help! I need to redo it but want to do it the right way. Michele :)