finishing inside seams

[brankulo]

i took my current project (gas tank) little further and lined it with different color fabric. i sew everything inside out with 1/2" allowance. now to finish raw edges i used grosgrain. what i am not sure is how to finish corner where 3 fabrics meet, like the front of the tank where top xpac meets side xpac panel and bottom cordura panel? or is there another way to do this?

[Krampus Snail]

Often if you fully line a piece, you don't need to finish the raw edges at all.