thanks everyone!!
I actually thought about those scorch marks... but then Boba's cape does not have them either, and neither Boba nor Jango had 2 big scorches on their bread pieces.
I think it would look funnier with 2 marks then without, as people won't see me flying anyway it might have some use other then flying... like Boba's " rocket" which was intentionally designed as a grapple hook.. now why would you need a grapple hook for something that flies?