The one I would go with is the Raggtopp Cleaner and Raggtopp Protectant for cleaning, renewing, protecting and beautifying your fabric convertible top.
I agree with Zoom, Raggtop is the best. I know of no product that will "darken" your top. At least once a year I do the Raggtop thing. I have a garage so it doesn't sit out but prior to any vacation it gets treated. Water beads up like a good wax job. Best on the market...
Thank ya folks .The car is garaged all the time except when I'm on a road trip .I bought the car new but it had sat on the lot in Peoria Ill for quite awhile prior to purchase .Peoria has a lot of airborne crap .GM Junkie took delivery for me and took it back to his shop .The guy did a fantastic job detailing the finish ,clear bra etc but I've always felt the top should be blacker .Not that the top has grayed or it's black but my 03 had a deep deep black tone.