Can Default And Named Skin Apply To A Control?

I have several regular expression validators in my site. Some validate postal codes, others validate phone numbers and still others email addresses or something else. What I would like to do is be able to specify a SkinID for regex validators that have a more specific purpose (e.g. postal code validation), but also have the default definition for regex validators apply as well.
So, I could specify some properties that apply to ALL regex validators and then some properties that are specific to certain regex validators (which I would specify by SkinID). Is this possible, or does only 1 .skin file definition apply?
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