How to make your own penetrating oil
Rust penetrant manufacturers are constantly working to improve their products.
The latest formulations work better than previous brews. So if you’re
still using a 10-year-old can of penetrant, you might want to upgrade to the
latest formulas from Liquid Wrench or the Specialist Rust Release Penetrant
As great as those new products are, occasionally you can get by
with a home brew—a 50/50 mixture of acetone and automatic
transmission fluid. It has a strong smell and is far more flammable
than commercial products,
so make sure you use it
away from flames.
It doesn’t work as
fast as the commercial
but if you need rust
penetrant in a
hurry, it will work.