[Bazzer]

I wouldn't paint the stripe directly on the body.
I would spray a bit of clear decal, cut it to size/shape and use that, far less risk of damage to the painted body.
When spraying decal sheet, do not wait overnight to use it (it will dry stiff as a board) use it within 4 to 5 hours (less if you are brave).

Joel

That is a seriously good idea.

Baz