Hey all! So... I have one of those old "drop bottom", canvas covered "chip board", cases circa 1900's tha'ts often seen with old instruments of that period. I don't use it of course, but it came with my 1914 L-1 when I bought it years ago. I would like to keep the original case preserved from further degredation. The case is in overall good condition and fairly stable, considering its age, but the canvas could use a good cleaning and protection if possible. I know how to preserve/protect leather but as far as the canvas board stuff, I'm sort of at a loss. Just not sure what I could/should use if anything at all. I've searched and searched trying to find some recommendations but outside of calling the Smithsonian or something, I haven't been able to find any info on this topic. Does anyone out here have some suggestions/experience on this? Thanks in advance for your help and suggestions!