My Duetto is in the process of being repainted, as discussed in another thread
here in the restoration forum.
I would like to discuss a topic more relevant to this sticky thread, so I am posting here. The thread is quite detailed, but does not cover the issue of finish painting over the various types of primer coats.
My process flow was to first get the car media blasted, then primed in epoxy, then have any relevant panel restoration done, then get the finish paint applied.
I am now faced with an unfortunate reality: the paint can't go over the previously-applied primer due to the time lag - it needs to be fully scuff sanded to allow adhesion. Even then, the finish coat will be making a mechanical bond with the primer, rather than a chemical one. On the outer body surfaces, sanding seems straight forward, but for all the other surfaces - inside the wheel wells and engine bay, it seems it would be almost impractical to scuff-sand with a high degree of success in corners, nooks and crannies.
One thought I have been having, and discussing with the shop, is to simply do another media blast and get back to metal, then do wet-on-wet primer/final. Not surprisingly, the cost of a reblast may actually be less than the $$$ for all the sanding man-hours and material.
Am I being obsessive here? Any recommendations?