Couple of thoughts. A good man with a TIG welder should be able to fill the Farage lettering with weld along with other pits. It can then be taken back to clean surface. But as has been said elsewhere you will be better with a different action and many will already have a bent bolt handle etc. Those older Brnos are strong actions and the triggers can be changed out. Plenty of older Parker Hales and BSAs also have good actions, also early Sakos.

As for takedown, the best to my mind is the H&H style with a stock coming off. No issues with return to zero etc. A takedown with removable barrel takes a lot more work - and cost. And to my mind having two barrels is a compromise. A 7x57 should be a nice dainty little rifle, whereas a 318 needs a bit more meat in the stock etc to soak up the recoil. A 318 with a 7x57 barrel would just be wrong.