I have a problem when i use the tool curcular filler to create a nice eage and then tyy to cut out the othe parts with trim tool that i dont whant to have the program dosen do it.
I have tryed to put the filler on diffrent sides and chainged the normals but still iw wont cut out both things.

I try to make air holes fot the hood and this shows when i select the part i whant to keep and when i do that there dosnet apear a hole. So it shows like this when i need to choose what part i whant to keep and afther i do that it dosent cut anything out everrything is still there.
help me plz.