My oil filter protector was made from a tin of Ocean's canned salmon. The can is tapered, with the bottom being a perfect fit for the filter. Also, the can, from the bottom upwards, is one-piece...there is no seam at the bottom. Cut to fit the oil filter length (plus a bit extra for the rare earth magnet disk I use to help secure the can to the bottom of the filter), then rimmed the inside upper edge of the can with a thin layer of cork for a perfect fit.
Painted the outside of the tin with black spray paint.
It works like a ******, cost me $3, and I got a meal out of the salmon. I'll post some pics later.
