I have a part (see picture) that is a revolved part which is "simulating" an actual sheetmetal part.

On the cylindrical face you can see I've modeled some louvers. The problem with the louvers is that

they do not break thru the "sheetmetal". On the louver facing you, you can see a 3D sketch where

I would like to cut a hole in the cylinder where a real louver would have pushed thru the material.

My problem is I do not know the procedure for using this sketch to cut the material.

Can someone point me in the right direction?

Thanks