Usually I change the filtration Marcus. However, be bold, as the effect of raising contrast filtration may be less than you expect, due to the exposure you have already given.
Originally Posted by brummelisa
If you want to locally shift contrast try holding the area back throughout the first exposure and burning it back in with a higher or lower contrast. It's easier than you might think and with little practice becomes quite seamless. You then get the full effect of the filtration you use for the burn in.
Also, don't forget that you can adjust contrast with bleach