For the 993 I decided to wetsand with 2000 grit sandpaper followed by a few passes of M105/W8006 and PlastX/W8006. Finished with NXT Tech Wax 2.0 + UQD.
I especially like the reflection of the Carerra badge on the RS ducktail spoiler.
Great job with the Porsche KC!!! More pictures of the Porsche can be found at KC's blog: