How do you guys work with fabric seams?

What is the proper technique for working with fabric seams on long or large projects?

How do you join the seams in a clean manner?

Thanks.

To be perfectly clean you’ll need to be working with prepreg. Other than that you just have to cut very very slowly and carefully. A normal scissor will not do. You’ll need a fabric scissor. The thick heavy metal kind that you see at the sewing shop.