I'm trying to get some pedals out of alloy cranks. I live in a hot humid seaside island, so rust is endemic and fierce.
I spent 10 minutes whacking a spanner with a hammer without budging them, till I snapped the jaw on the spanner.
I've tried spraying with WD40, to no obvious effect.
Any suggestions? I don't live in the US and our hardware and bike shops don't carry
the exotic anti-rust concoctions I see advertised on various webpages.
Could heat help or make it worse?