Support / Raft interface specific / critical areas only?

Hello. New here.

Run into an issue that I’m not sure how to get around. I’ll try make it as easy to explain as possible.

I made a design and the issue I have is the PLA trees are fine to remove but leave a certain key area a poor finish when removed. I would like to use the support / raft interface feature to make 1 delicate area super clean. However, due to the whole prints shape it would mean that every support tree has this feature also. This wastes a lot of filiment and time. Ultimately, is there a way of keeping standart supports but where you need a super clean removal us the raft feature and use PETG (or vice versa with the material). I hope thats easy to understand. Basically raft interface in 1 area of a print only.

Any help would be appreciated.

Daz