Ultimate Compound not QUITE cutting it. Recommendations?

[Speed_Demon]

I have a tree sap issue on my roof, today I have got off the vast majority using a generic orbital buffer, standard mitt it came with and some Meguiar's Ultimate Compound. While almost there, patches remain that are proving a little more stubborn so I am looking for a Polish just a little more abrasive to get the job done.

Any recommendations? I was considering Meguiar's ultimate Cut Polish #105 with the same set up?

Picture of current state:


TIA.

Edited by Speed_Demon on Saturday 25th March 18:35