I agree with the tinfoil idea - I had a cat used to dig in my houseplants - not poop luckily, just dig! And tin foil scrunched around them stopped him. After a while I took the foil away and he didn't resume - the habit was broken.
I also agree that shutting her in the garage won't work. She won't understand the 'punishment' - though I can understand your frustration. I've had a lot of cats over the years and some have jumped on tables and some haven't. My current one doesn't luckily but I know it's a p in the a. Try the foil, spread over the table, slightly scrunched up. If that doesn't work, try something slightly spiky, like holly branches. Not anything that will cause serious injury, just discomfort. You could also try ignoring her, see if that works - if it's just attention seeking, that might stop her. :D