Primer applied x4 coats.
I did get away without need for spray putty, but went mad with spot putty instead
It's easier to sand with 400 grit paper.
While the panel was hanging from the hoist, I got stuck into the inside bits and seams. Sanded any areas where sandblasting didn't get all the old paint & muck (Grrrrrrrrrr!).
The 'under' parts, not seen, will be sprayed with an underbody sealer. I use a non-tar based stone guard. It dries completely and is able to be painted. It's the same stuff that was used under wheel arches on cab, and inside the rear lower cab panel. I cannot recall the brand at present.
Any seams which will not receive the spray sealer were filled with 3M gap seam sealer. Not the brush on type. It was applied along the seam straight from the nozzle of tube, then smoothed neat by running finger (or turps rag) along.
A little wrinkle: If using finger, wet the finger first, it stops the sealer from sticking and gives a much smoother finish.
See you next weekend
