How to thwart cats

An friend here uses two of the following devices very successfully to keep his two cats away from his stereo setup:

Scat Automated Cat Deterrent
.

I would be interested in any other products that also work for cats to keep them from scratching grill cloth and chairs.

There once was a man with a cat
who went all over his Bat....
Rushton popped in and said with a grin
dont forget to try some Scat.
Sorry cant help myself
Cheers John

Bradgregg, one time I was buying an amplifier from a guy here locally, so I went there to pick it up in person since it was about a 15 minute drive.
Now, this was about 10 years ago, but I will probably remember it for the rest of my life. This was the weirdest and the funniest crap I have ever seen. The guy owned ML Aries speakers and when I walked in, the 2 parrots that he also owned were just flying around the listening room. When he turned the lights up a bit, the Martin Logan Aries speakers, the panels, were completely covered in bird$hit. And I'm talking about bird$shit that's been there for a while. The old, dry and color-faded kind. The speakers were as clean as the car that's been parked under a tree for about 2 years....you get the picture....
Forget cat litter and hairballs inside your amp. This was way better!!!! I actually bursted in tears from laughing. I bought the amp because it was brand new, sealed in the box, but I had to open it just to inspect it to make sure it didn't have the same "tweak" as the speakers.

I know him!

I visited that guy and he invited me to watch a movie with him. It was Alfred Hitchcock's "The Birds." Absolutely the most realistic rendition of the movie I have ever experienced.

Imagine that Crow replaced with a Parrot sitting on the fence pecking Tippi Hedrin on that long path up to the front door and you begin to get the mental image of how scary it was.

I must admit though, the "Polly Wants a Cracker" remarks did detract from the movie in spots.