Some minor tweak were done to the RF side skin before they could be primed.
First I filed the cut-outs for the interfering rivets:
The right skin has a higher revision, so I decided to add the mods to the left skin as well, I used a simple paper template for that:
With the snips I removed the corner and with a very small round file I filed the notches:
Next edge rolling, very careful, this tool is dangerous, so easy to damage the skin:
Next sanding, cleaning with Acetone and shooting the primer:
And with a foam roller I applied some epoxy primer to the mating surfaces: