My normal routine of cleaning my car with Meguiar's car wash gel, chamoising and polishing and waxing does a great job of preventing water spots on my light silver A4. However, this routine does nothing for the hard water spots left on the outer glass surfaces.<p>My local body shop recommended using what he called "double naught (aught?)" steel wool, which I assume is a very fine grade. Does anyone recommend doing this or will it scratch the glass? If so, can you recommend a brand and product designation. For example, is it labelled "#00xxxx" or somthing like that?<p>Thanks for your comments.<p>/rich

For glass "cleaning", I'd use the GLassX or RainX<br>cleaner. I cannot remember the exact name. It smells like ether, and cleans like it, too.<p>Try clay also. use clay first, then a window cleaner to cleanup the clay streaks.<p>tjj

I have used regular SOS pads on car windows for years and have not scratched one!<br>

I was probably the one who mentioned the use of steel wool in the past as I am a big proponent of using steel wool and I specifically recall submitting responses a little while back. I have been using it for many, many years without any problems. The wool will do a fantastic job of cleaning any crud that glass cleaners just can't get off the window.<p>Your shop calls it "double naught" which simply means the grade is #0000 (four zeroes). You can use #000 as well but I stick to #0000. I usually buy mine at WalMart. Any hardware store should also sell it as it is used for furniture refinishing as well. I don't know any brands off the top of my head because I buy whatever the store has. You could also get some from a glass shop if need be as they use it as well.<p>Just be careful of hitting the paint when you get near the edge of the window. You have to be pretty sloppy to go over the edge of the window but just keep it in mind :)<p>If you do decide to use Bon Ami instead, make sure you heed Warren's advice and get the right type of Bon Ami.<p>Good luck, I'm off for the weekend to enjoy my car :)

I started using rain x a couple of years ago (I live in the pacific NW). When a new coat is on the car, it is simply amazing, the water just beads up and rolls off like a nice coat of wax in below. But b/c it seemed that visibility was sometimes poor, I put some on the passenger side of my friends car (w/ his permission). It worked great at first, but then after about a week, it became really hard to see out of.<br>The wipers don't clear as well anymore and when it gets cool out (especially at night) they windows get some sort of 'permamist' quality, if you will.<br>So, has anyone else had similar experiences, I would really like to know.<p>PS: Anyone try Fog-X? I had some problems w/ that as well after a fresh coat started to wear off.<p>john