lcd protector

a700, lcd, a word of caution

I encountered a problem with the lcd screen on my a700. I attempted to polish out some minor swirl marks with a mild plastic polish and ended up removing most of the anti-glare coating. I knew should have placed a protective cover over the screen but I was in a hurry to try out my new camera. I never had a problem with my a100 lcd screen without a protective cover. I figured the a700 should be ok for a 1 day hike - what a moron!

Invisible Shield for A350/300 LCD...or Not?

I've used these before with great success in terms of truly invisible protection.
But I've never used one on an LCD which I depended on for Live View.
Are any of you using one on the A300/350? If so, with what success?
Is the LCD scratch resistant and not needing a protector?

Thanks.

Mark