One question we often get is what is the finish on the building? This is up to the person building. You can cover with stucco, siding, brick, etc. 

We prefer to leave the formwork in place, see picture below, why? It provides a perfect waterproofing and also building envelope sealing. 

However, some people have asked if it can be stripped to raw concrete for architectural reasons.

Yes. This is an example. However, in order to allow for the continuous pumping of air and water for the sequestration, the formwork has to stay in place.