Footrot and scald are different bugs, though scald will often precede footrot. Footvax protects against footrot but not, I believe, scald.
If you just have a very few sheep, blue spray is very effective against scald and is practical as a solution for small numbers.
For larger flocks, you can trot your lambies through a 2% formalin footbath once a fortnight - it will toughen them up a little but not excessively, and will keep on top of the nasty scaldy bugs. After the footbath they need to stand on cement for an hour if at all poss - if they go straight back onto wet grass or mud, you may as well not bother with the formalin footbath.
However, formaldehdye kills most things, can only be used once and is very difficult to dispose of safely. There are alternatives you could consider. Golden Hoof is a copper sulphate powder; the solution you make up can be reused and isn't so environmentally damaging as formaldehdye. But the sheep need to stand in it for a few minutes, so for more than a footbath-full of lambs, it's a longer, harder job to administer.
You could also do things like putting lime in gateways and around troughs - anywhere the sheep trample over each others' footprints. It'll help stop infection spreading from foot to foot, and will also go some way to reduce infection in feet already infected. Move your troughs regularly, try not to have different batches of sheep follow each other through pens, etc - all common sense stuff, really.
Other things that will help include keeping the sheep on short grass - when the feet are soggy and wet, especially if they have any open scaldy sores, the constant friction caused by long wet grass pulling between the cleats is excruciating for them.
Their feet will be much happier when the rain stops. Then we can all (re)start worrying about flystrike...