try novus with a buffer. i have yet to be unable to get the window reasonably clear with that approach.
i've seen a few rear window section replacements. they never look good. the top is always faded more than the owner expected. as a gauge, lift up the section at the vent behind the side window. look at the stitching. it should be black, as should ALL stitching on the top. if the stitching is faded on the top, you can bet the canvas is too, and when you put new canvas up against it, it will really show.
the only top i think you might get away with it on is a grey one, and i'm still not sure about that.
besides all of that, the job itself is a pain. in order to take the rear section off, you have to practically remove the entire top. at that point you risk tearing the old section when you put it back together.
there isn't much cost savings either.
give the novus a try. it's amazing stuff, comes in 3 grades, and when applied with a buffer, really works well. remember to mask the canvas first, or you'll get the compound all over it and it won't come out easily.
94 Midnight Metallic Blue Cab Porsche 968 w/deviating cashmere/black interior and WAY too many mods to list - thanks to eric for creating
www.968forums.com
"It isn't nearly as expensive to do it right as it is to do it wrong."