[smegtheprez]

I'm not sure on the Alpinestars but Joe Rocket and Fieldsheer patches are only sewed on, no glue.
Those patches come off easy with a few snipes of the thread. But if you have textile waterproof material it will leak unless you use some type of sealant after you remove the patch(es).
Here's a couple of places for patches.

http://prohatsandpatches.zoovy.com/product/X_DUCATI_LG
http://store.proitalia.com/decalpatches.html