How to fix damages cause by tree sap?

[blaubenz]

Hay I my 2005 x5 a few months ago. There was some tree sap (what I think are tree sap) on various area of the X5. The previous owner got most of it off that is why I am not sure it is tree sap but I am pretty sure. I am pretty sure the previous owner did not clean it right away. He/she take it to the car wash once a while type of person.

When I got it the spot in question (picture attached) still felt rough to the touch. So I wash and clean and used Turtle tar and tree sap remover on the spots. I also used clay.

Now it is smooth to the touch but the spot can still be seen ash show in the picture.

The only think I can think of is to use a paint polish. But paint polish really cut into the paint.

Any suggestion or techniques. Proven techniques for this sort of thing is most appreciated. thanks