I think the dark blue was cleared as I've seen them blister and peel like newer cars before.
On my own car I painted the bay with spray cans,and over time it's turned to crap,and now really lets the rest of the car down. I cut back the original paint,put on two coats of acylic primer,sanded the top coat back,then put on two coats of acrylic colour. It chips and flakes really easily,straight back to the original red and holds dirt like mad,I really regret having done it myself. At the time I couldn't afford to have it done professionally,and I'm paying for that now everytime I look at it.
If the car ever comes off of the road for an engine swap it'll get a bay repaint .
Justin...