I have a jar of Spencer & Devon shaving cream of the unscented variety. Makes terrific lather but has a fragrance kind of like clay. This morning I added a splash of Michelsen's Bay Rum to the lather bowl and...behold...it then smelled like bay rum. Not bad at all, in fact. My question is, anyone think this is bad for brushes? It seemed to survive just fine but, this was only once.