As you can see there is a mix of silicone from my overexuberance, flake rust from the cooling innards and bits of gravel from god knows where (ancient casting sand?)
Many of the fragments are just the right size to block off a rad tube.
This collection is from the first 200km of use.
The filter is made from an old pair of my pantyhose, the thick ugly opaque type.
Edited by rexy, 13 January 2013 - 02:49 PM.