So a coffee can with a roll of toilet paper oughta suffice.

The problem with the paper filters over time is the paper particulates breaking down and getting gouped up in the engine. Whether at a measurable rate or not (during a 5k mile run), paper will breakdown quicker than metal (I know, extremely obvious). With that, a filter with a multi-layer metal mesh seems more logical, although considering a short run it might not make THAT big of a difference.

'91 RS, '93 SR