Create Sheet Metal to Planify Various Curves

Hello!

Im having some troubles on the creation of a sheet metal part that covers those brown parts on the image above.

i have to create that sheet metal to planify to cut it, as that fits on model

My purpose is create a sheet metal all over the piece (like that on green), and have te possibility to planify it to cut.

I was trying to create that on 3d sketch, its that a possibility? Can i create that as a cavity or something?

Obs. my SW is sw14.

Thank you guys!

SolidworksGeneral