Damaged clear coat and faded paint - DIY refurb

The clear coat on the boot of my car has failed. The paint underneath has faded. I suspect a piss poor job of a repair is the culprit.

Can someone describe the method to repair if I wanted to have a go myself?

I've sourced the primer, paint and 2k clear coat. The wet/dry (various grades), degrease, tape etc. G3 and G10.

Questions:
What grade wet/dry to remove clear coat?
Do I use a rougher grade first (what?) then a less abrasive grade to finish (what?)
Do I need to remove clear coat from entire boot ?
After I've primed, do I resand? - if so, what grade?
Do I resand after basecoat? (don't think so, but advice please!)
Once I've then re clear coated, how do I finish to make it pop ? (G3 and G10?)

Ideally, I'd prefer to prime and base the entire boot lid - I'm not comfortable trying to blend, as I think it would look odd.

I'm basically looking for a step by step process. I'm comfortable in how to do it, just not in the method if that makes sense.

Thanks guys.

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