Hi Jonny,
Good job on the stripping! Keep the good work! ;-)

One thing tho, Once a part has been prime, it can not stay without paint for more than a day or 2... The primer must not get in contact with humidity once it is dry.
You must paint over it (with final paint or under-coat) ASAP .

Ho.... and do a test first primer... then paint on a small section to see if the paint re-act to the primer. (not all paints are compatible with all primers...)
If it bubble, it's a no go! I had that with primer from Plasti-kote.

Laurent