Oh...I've got it all documented. But, it just takes so much time and patience....I don't know if I would want anyone to go what I went through!
I think the easiest way to do it is to paint it from the outside. Sure, you can sand the inside and probably get it 100% perfect. but, you can't sand too much or you will get defects in the plastic. Getting rid of those....it's like...impossible. You'd need to buy new ones and start over. Also, you have to make the dash and door ABL trim the SAME...meaning, if you polish the dash parts to a clear, you'd need to do that on the doors too. OH....I don't even want to think about it any more....lol
Attached are some of the pix I took during my process.,
You can see from the first couple of blue pix the area that was sanded by the shop where I had them painted. ...err...they painted them, screwed it up, sanded (and didn't bother to sand it all off as evidenced by the pix right here), painted back over and tried to call it a day.
This is one of the many reasons I took on trying to fix them myself.
You can see how I sanded down the entire inside of the panel...smooth as smooth as could be. I painted them, it looked pretty good. But, I'm a perfectionist...and all the time I spent repainting (and sanding again twice more) was just not worth it to me.
Yes...it can be done. But I'm not screwing with it any more!