I've seen a lot of videos of guys repairing/renewing their plastics in several ways. Seems like wet sanding and buffing is the way to go. And a heat gun will take out those ugly white stress marks. My question is, will either method take care of the difference in color after you take off a sticker that's been on there for 15 to 25 years. I'm not talking about glue residue. I think it has something to do with not being in the sun for so long when the rest has. It's like when you take a painting off the wall that's been there forever. You can see the outline of the frame. I haven't seen any posts or videos addressing this issue. I'm sure both methods will reduce the effect, but can you get rid of it completely? I ask because I'm considering taking off some decals on my blue fullbore plastics that are about 15 years old.