That active spoiler setup is looking awesome now it’s been fully refurbished, great job.
It’s been a year since i sprayed my active spoiler blade with the Eastwoods plastic resurfacer and I can honestly say it still looks like it did the day i first did it, hasn’t faded at all, no chips. I did use the Pre painting prep cleaner as it was recommended on the video clip I watched about using this stuff, you are correct I did sand my spoiler blade as well like you did with different grades of fine wet & dry emery paper.
I found this stuff different to paint also and I’m tempted to do other parts like your on about as the blade came out so well.
I must invest in a electroplating kit so I can start refurbish parts like that, been looking at getting a kit like this for quite some while now but just kept putting it off! Think my minds made up now after seeing what you’ve done with it.