Some years ago I renovated my original collection of Dinky racing cars from the 1950s and the tyres were shot, just hard and cracked. Luckily there are suppliers of replacements for these, but I doubt if this would be the case with your Pocher kit. Nonetheless, you seem to be making great progress with this project, Greg @gwfabian, finding the original wrench was great news.

A quick update. I've managed to disassemble, as much as I could, repaint and reassemble the engine and transmission/transaxle. The chassis has been completely disassembled and I just cleaned and repainted the frame rails. I decided that I would not polish the brass fittings (except maybe the radiator frame) as I think it looks good in its current state and, perhaps more importantly, would be almost impossible to do for many of the smaller parts.

4 attached images. Click to enlarge.

Really good progress, myvfriend @gwfabian! A joy to see all those disassembled parts refurbished and slowly put together.
I agree on not polishing the brass fittings: they look great "as is".

Since my last report, I've painted the first coat of the body panels using Model Master Italian Red (appropriate as this is an Italian automobile, after all) spray paint. I also painted the chassis rails the same color. I'll follow that up with a clear coat. I began reassembling the chassis. Progress is slow because it is summer and there's lots of other more interesting things to do outside. After practically taking the model apart piece by piece, the one odd thing Pocher did was mold in the part number on each plastic part of the model. I think they did this because, if I remember correctly, the parts were separated from the sprues at the factory and then sealed in plastic bags. Anyway, the next step is to reattach the transmission/drive unit onto the bottom of the chassis and the chain drive with the rear wheels. You'll se what happens in my next post.

3 attached images. Click to enlarge.

Everything seems to be cleaning up nicely, Greg, keep up the good work, I'm sure the end result will be worth it.

Very impressive model! I love these classical cars, maybe I should take a look on the market of plastic kits for something similar and put it into the dungeon of unbuilt kits, a.k.a the stash.

There are a few unassembled Pocher kits out there, @pikofix, but they're very expensive. The Fiat here, which is the least expensive Pocher kit, goes for about $1,000 US with the other models substantially more from there. If I ever got another one, I would go ahead and build it.