A friend of mine was lucky enough to have his fiancée offer him a straight razor. Unfortunately, she offered him something found at a yard sale, on eBay, or something alike. Thus it would need some restoration work before being usable and used. He asked me advices, because he knew I was into straight shaving. But I just use and hone straights, I don't restore (so far ).

So my question would be: "What would you advice as a starting beginner set-up to restore straight razors?" (excluding honing, as I already have this covered)

Few remarks or constraints for the answer:
1) sorry, I don't have pics (but this is totally salvageable).
2) the point is less to have the straight restored (as I know people offer this in the services section of the SRP classifieds) and more to learn and "do it yourself" (so to acquire the tools and materials).
3) he lives in France, I live in Canada. Thus, availability of some products or brands may vary a lot. Feel free to suggest generic rather than specific (i.e. metal polish rather than maas).
4) I'm on a budget and am space limited, he's not (or much less). So feel free to explore the range of equipment, from minimal to dispensable-but-very-useful.
5) I'm looking into this as a realistically one-time-fun-activity for him and a one-time-but-potentially-start-of-a-long-lasting-activity/hobby for me ...
6) I'm interested both in your opinions, suggestions, etc.... and in links to other posts or places to buy/know more.
7) right now, we're not interested in making the scales.

I already know that, at the very least, I will need to unpin it, clean it from (rather light) dead and active rust, clean the scales or buy new ones, and re-scale it.

Thank you all.
Cheers.