You can spray the outside w/ a scent killer product, but don't use cover scents, especially when storing. The carbon in the suit does not differentiate between scents it adsorbs everything.
BTW, carbon based clothing is a hot topic on this site with many members skeptical and some downright indignant about it's value. I use scent-lok but I do realize that it doesn't eliminate odor but is just another tool at reducing odor. Most of the objections are based on the fact that you cannot re-activate carbon in a clothesdryer. The word re-activate was a poor choice, I do however believe that placing the garment in a dryer on high for 30 min. does drive off much of the adsorbed odor rendering the garment once again useful at reducing your odor. You still have to play the wind.