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**truckster** · 08-30-2016, 10:20 PM

WD-40 isn't very good at penetrating rust. Try PB Blaster, or you can make your own from a 50/50 mix of acetone and ATF. Supposedly that's the best rust penetrant there is.

08-30-2016, 10:20 PM	#2
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,807	Re: large 40 gal Aero tank question WD-40 isn't very good at penetrating rust. Try PB Blaster, or you can make your own from a 50/50 mix of acetone and ATF. Supposedly that's the best rust penetrant there is.