@Chris: So you mean to say I can remove the grease/dirt marks with a damp cloth + some soap and water then leave them to dry and oil them again?
@Megatron: Thanks for the advice! Yeah, I noticed too that Bullhide doesn't seem to be as tough as the other leather choices that white's offer and the leather finish on my RedWings seem to hold up better against abuse such as scuffs, dirt, creases or scratches.
@Bluegrass: Thanks for the compliment. I was wondering if White's make these boots with the white coloured Vibram morflex soles. Would probably look great too in that configuration.