I have used quite a few traps for years that have never been waxed and they are pretty rusty! But they still work good. These traps are used in back-blocks country on cats and I would not use use them on foxes etc as a general rule (although I do catch canines in them). While a little slower than a fresh waxed trap, they catch just fine, and are similar to comparing a reasonably well used trap to a new one (with original springs).
I have some clients who use poison on foxes (its legal here) and they put their baits at exactly the same locations, year in, year out. When they first put out baits at say 10 per sq mile, some areas lose baits and and some dont. Now what that tells you is if you find a good spot that catches, stick to it! In this way, that good spot will work well time and time again. I use the exact same locations for trapping for years - if I have caught there in the beginning (if I dont catch, I normally dont bother setting there again).
In a remake situation, not only do you have a proven good spot, you have the added bonus of lots of scent to attract another one. Use it to your advantage and save yourself a lot of time looking for other locations and setting where the location just doesnt catch.