Rattle can (using that Dupli-Color perfect match). The other 3 pieces turned out excellent, color match is spot on, smooth mirror like finish.
No doubt, this piece will eventually get there, just heart braking when you think you've scaled the mountain and then bad goes to worse in a matter of moments.
For the wet sanding
I am actually using the small 1" sq. pads that I had in an old headlight reconditioning kit. though they don't call out the grit, it feels like they are around 800 up to 2500.
As for the buffing, I am using compound polish and a 4" cotton, drill buffing wheel. low RPM and just very carefully. Any small crevices I can not get into and just use good ole elbow grease and a finishing terry cloth.
Once finished, I will post some pics, but of course now the weather is being difficult and it may be too cool the next couple of days for me to go at it.