I'm sure Neil has much more to say about this than I do, but belts do not do as good a job as strops, in general, and I would imagine the sheer lack of smoothness of many belts, not to mention dyes and coatings on belts, could easily ruin a delicate razor's edge.
With that said, I have used my belt for my EDC, and even used the leather on my Birkenstock shoes after using the concrete curb, and it will work in the field, but I would not attempt to shave with those edges. Stropping takes what you have and makes it better, but if you have a #600 edge and strop, you have a "clean" #600 edge, not a miraculous 30K edge - unless you use a loaded strop(s).
I wonder what the factor of sweat has on the performance of a belt as a strop, though.....