Engine bay respray - progress

Does it even need high build and sanding? Being an engine bay, I'd be tempted to just shoot color over the epoxy. It looks nice as-is. Is it not?...
I guess it depends on what kind of finish you want. There were some dents and dings I repaired and filled so I want to make sure those areas don't show. I sure bought myself a lot of work spraying the primer which requires sanding. I'll only fret over the visible surfaces like the upper firewall and upper areas of the inner fenders.