I've applied VSC to my 403s after a year of hard use including subway rides to the office and desert hikes in Arizona. Well, the VSC did its job and then some! The boots are now way too shiny and all the hard worked scuffs have come out.
In my future Indys (not incl cordovan/suede), I will stick to damp cloth / brush.
How much did you apply?
I used some on my 403's and they did clean them up nicely but there was barely a shine. In fact I need to give them another brushing this weekend and if that doesn't do the trick I might apply some VSC again.