hello..Thanks for your query
Dipsalic is the correct medicine in Psoriasis
The patches might always not clear up uniformly leading to the appearance you mention.Also the salicylic component of this medicine is keratolytic
and may give rise to a similar look.
I suggest you apply medicated emollients in the patches and keep them hydrated.This should be done multiple times in a day .This aids
in faster resolution as well as better action of the topicals you are applying.
Hope this is helpful.