On Tue, 18 Aug 2015 14:28:33 +0100, soup wrote:

Looking for a penetrant to get some seized parts separated.

Does anyone have a favourite (Plusgas, WD40, WHY).
I would prefer aerosol but am not immune to being told it's much cheaper
and really no more difficult to use a liquid.

All the proprietary ones I've ever tried have been utter ****E. Get a
blowlamp on it and get it red hot. Never fails.