This was where I started to learn a bit more. Filler? Well OK, but it's not the answer in a lot of cases...not if it's going to be seen. Obvious, you might think...
Old headstock laminate removed. Headstock split was eased apart with scalpel blades,  glue run in, then clamped up. Seemed to work fine. Various holes filled, along with the gouge on the top.
New laminate made out of 1mm black/white plastic and glued in place. So far so good - very pleased.
Filler no good - Case 1. Tried to colour it, but soon realised it would never be good enough. Removed some thin pieces of maple from area under scratch plate where the grain matched. Trimmed and sanded to shape, then glued in, clamped up, then sanded smooth. 
Filler no good - Case 2. Various smaller dents and scratches on the body likewise were never going to be good enough. More filler removal and enter "drop filling" with lacquer (in this case sanding sealer - a high body content lacquer). Drop it on, let it dry and shrink, drop more on etc, the sand it smooth. Wonderful technique!

Pictures show the body after a couple of coats of sanding sealer. 

 

 

 

Now is probably the time to mention another two essential sources of information. 

The first is the guitar refinisher's bible - the Guitar ReRanch website. Want to know how to mix dyes? How to prepare wood? How to do a sunburst? It's all here - this is essential reading. It's a US site, so if you're elsewhere (like here in the UK), you'll need to source materials locally. Airlines don't like to carry nitro...

The second is the Guitar Refinishing and Restoration Forum. This is hosted by the ReRanch people above, and if someone's done it or had problems with it then fixed it, it'll be here. Being new at this, I contributed very little, but read a lot. Try to search for answers first, before posting a question...

 

Re-fret went fine - surprisingly. I wasn't looking forward to doing it, but I had a few things in my favour. The neck didn't have a binding (which makes things simpler) and it's got a truss rod, so if the fretting altered the relief, it would have been more easy to fix.

Limited the amount of fret dressing at this stage until I could see where the neck ended up after it was re-strung.

Hardware cleaned up quite well. One of the brass spring caps had to be replaced with a new one turned out of brass.

No joy on finding an original tremelo arm - the only missing piece.

Eventually found what may well have been the last set of unused tuners for Hofners of this type and era. Thanks to Norbert Schnepel of Musikkellar, Dorsten in Germany for finding these. A good source of vintage guitars and bits.

Wiring was a mess, but the pots and switches were OK, despite being  almost 50 years old. Steve Russell (see Home page) found me an original Hofner wiring diagram, so it's back the way it was.

Pickup magnets were terminal and rewinding would have achieved little. Andy Blake of Wizard Pickups fitted new single coil innards inside the toaster shell. OK, it's not original, but I wanted something playable.

New scratch plate made up from 2.2mm black/white/black plastic. In the picture it's still to get its white painted edge trim . Original switch plate cleaned up well, but writing a bit faded...honest wear.

"New" tea cup knobs and tremelo cover from Music Ground in Leeds.