Your shrubs have a severe infestation of lacebugs.  Here is the control information from our website: http://extension.umd.edu/hgic/lace-bugs-trees-and-shrubs
This is a very common problem on azaleas, and we are seeing a lot of it this year.

The gray-green on the trunk is lichen, a combination organism made up of algae and fungus.  It is not harmful at all.

Here is a helpful publication about azaleas, which includes a diagnostic chart: http://extension.umd.edu/learn/ipm-series-azaleas-and-rhododendrons-hg51

ECN

Uh oh. So what do I treat it with? And how? Because of severity, should I hire a company and if so which? Or is this something I can do on my own? Thanks. 

Take a look at the link above:
"Management: Begin monitoring for lacebugs in early May. Damage usually begins on older leaves and later on new growth. If damage is heavy and lace bugs are actively feeding, treatment may be necessary. Horticultural oil and contact insecticides will give control only if the lower leaf surfaces are thoroughly sprayed. Systemic insecticides will give control if upper or lower leaf surfaces are treated. Check with your local garden center for currently registered insecticides. Always read label directions and follow safety precautions."

Be careful not to spray anything in the heat of the day, which can scorch leaves.

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