CNC different bit sizes for same job

Hey all,
So I’m using fusion 360 and I’m wanting to carve out an area about 3mm deep, using 2D pocket, but there are some small angles around the edge.
I wanted to use the larger 3.75mm flat end mill bit to make it quicker, but this size bit wont fit into the small crevices around the edge.
However, while the 1.5mm will fit, the whole process will take far longer to remove the majority of the space.
So I’m wondering is there a way to carve out the majority of the pocket with 3.75mm bit, then swap bits and cut the remaining area of the pocket with the 1.5mm bit, without it going through the entire pocket space all over again.
Any advice welcome,
Cheers, Tom

Yes, that is possible. especially with Fusion360. You need multiple toolpaths.
Also good news, the forum has a nice search function, feel free to use it.

A good start is this particular thread: Some info on cnc tool changes and combo cnc/laser projects