X2...
I havent clearcoated, but a good all over sanding with 1500 wet & dry..
....although kind of scary at first (cloudy / hazy mess!) is IMO the way to go
to remove original coating.
Follow this with a good mechanical buffing (drill/sponge buff pad)..
...using liberal amounts of Mequiars "PlastX".
We did two VX's a couple of weeks ago...took about an hour.
Mine had been done 3 years ago, the other VX, never.
They both look like new.
After this...15 mins with the buffer and PlastX every year
will keep them pristine
Jo