I took over SWMBO's Singer last week and made an equipment cover for my wire welder. The cover is basically a rectangle with the bottom missing. I used ripstop nylon I got on sale at the local fabric shop. They told me the material was waterproof. It's not. It's not even water resistant. Believing the hype, I left the welder outside on the deck, where I was fabricating new railings. Of course, it rained. I took the cover off and found water standing on the shelves of the cart. I went to the local Bass Pro, picked up some silicone spray used for tents. The directions said put on two coats four hours apart. This time, I put the cover over a lawn chair just before it rained again. I still had water under the cover. Is there an application, hopefully in a spray can, that has been shown to be useful as a waterproofer for fabric? That won't leave an oily residue?
Shiggins