ZBrushCentral

Zremeshing only some parts without loosing detailed subdivisions?

First of all i am new to Zbrush. I am trying to sculpt an Orc body. Started with a 3dcube primitive and sculpted , zremesh- sculpt - zremesh till i build down to the chest of the body. Then i am focused and detailed the orcs face. and pretty happy what i did. But now i want to make this a full body including the below the chest and arms etc. I mask the head and apply zremesh but i loose face details.
ANy advice how to build rest of the body without loosing previosuly done details and subdivisions.?

Body.jpg.
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Head.jpg

Attachments

Body.jpg

Head.jpg