I took the OP's term "spray equipment", and dirt to mean that it's some sort of post use application rather than putting it back in the engine of anything.
Back in my gap year, the mechanic used to filter it through "4 army hats", thinking old aussie felt slouch hats maybe, never clarified, and into his oil fired furnace.
Just for giggles, I seconded one of the kid's cola bottle tornado couplers, and made one myself.
24 hours on egde 5W30 A3/B4 run 10,000km in the diesel Nissan, and I've got maybe three teaspoons...still looks used, but is translucent.
Back in my gap year, the mechanic used to filter it through "4 army hats", thinking old aussie felt slouch hats maybe, never clarified, and into his oil fired furnace.
Just for giggles, I seconded one of the kid's cola bottle tornado couplers, and made one myself.
24 hours on egde 5W30 A3/B4 run 10,000km in the diesel Nissan, and I've got maybe three teaspoons...still looks used, but is translucent.