bearing rust and grease

[kaszal]

Hello, I've been checking my bearings after a rainy 1/10 off-road meeting. Can anyone recommend a good bearing grease that will help keep out dirt? It's mainly for the axle bearings, which are ceramic with rubber seals. I already have some ZX1 lube but I think it's too thin for wet/dirty conditions.

I was also wondering, is it unusual to have a little surface rust on the bearings the next day?

Thanks