Do not use the steel on them, nor a pull through or belt sharpener. They will hold an edge fine if you work on wood or cellulose laminate boards. You will need to find someone familiar with sharpening these, either with stones or tapes. They look nice.
I'm feeling bearish, and I'm packing a Wusthof Grand Brisket slicer from MABA
"perhaps...but then again...maybe not..."