[MikeK]

There's a bit of talk on this thread about using heat and melting the hole, with the benefit of no fraying edges.

Linen, cotton, silk, wool, and felt(an unwoven wool product) are all natural products that will NOT melt. Yes, they will burn, but that will not seal or fuse the edges. Only later synthetics like nylon, polyester, rayon will actually melt.

I have yet to encounter any anti-squeak material used in, or presently sold for Model A's that actually melts. It burns, yes. But burning does not fuse the edges.

Burning also leaves a fine carbon matrix on the fiber terminations that is hygroscopic. The last thing I want around a fastener hole is material that attracts and holds water.