I was really impressed with the quality of the Pilgrim shell.
Unless you plan to paint very early I'd suggest getting some Gel coat colouring from Pilgrim.
I made a few cockup's and managed to recover with some resin plus the colouring.
I do plan to have the car sprayed but not until I'm sure that all is in the right place and my car account has gone Black!!

C Before you fit the body [and it will be on/off numerous times] clean up all edges. Take a good look at where seatbelt/ harness fittings etc will go. There are strengtheners in the resin for these and it's much easier to see now.
Fit bonnet [this is impossible once body is fitted].

C Trim the sills, this will enable the body to be flexed in order to improve the door fitting. 25mm front to 0mm @ rear.

Follow build manual re-alignment.
I fitted front & rear but left the centre movable until I had the doors in place.

You'll need to trim back to enable tyre clearance on full lock, both front & rear.

DOORS.
Worst job of my build!! don't rush, do it in several bites.
C Passenger door - Fit 10mm nuts as spacers under hinge.
 Drivers door direct to chassis.

C Use Blue Tack to hold the door in place while you fit the hinges, you'll have much less adjustment to make.

C Cut slots in the spacer washers so you can add, remove without having to remove the bolt.