Over the summer I did the rear of my frame on my 50 Chevy using Por 15 and it worked really nice. I used the semi-gloss and everything went smooth. Now last week I decided to start on the front end and I noticed that there was certain sections that the semi-gloss black looked almost a flat gray. I’m not sure if it has to do with the temp in my garage cause it’s winter now, or there’s something wrong with the Por 15. I applied it the same way I did over the summer so I can’t explain why the change. Under my wheel wells probably look the worse. There’s larger areas where you can see the difference between the gloss and the flat areas. Can someone tell me what’s going on? Thank you.