danie, you've got a couple of good answers, so I'll just say - have a fun day and hugs and a flower for you sweetie.
Yes, suede (synthetic or not) will tend to get hoop burn. I would recommend using sticky stabilizer or other adhesive technique to hoop your fabric.
I never have, but I would assume the hoop would leave marks behind. Probably use spray adhesive to put suede on top of previously hooped stabilizer. Do a test run on very edge if no one else answers. *4U