A customer of the shop I worked at decades ago wanted his intake polished. Wanted us to do it until he found out how much $$ we were going to charge him. He decided to do it himself......looked really goofy when he bought it to us 1/3 done with a coat of paint covering it. If you are going to start on it finish it, otherwise it is like the folks that start a tattoo & don't finish it because of the pain.....