On Wed, 19 Aug 2015 17:29:04 +0100, Nick wrote:

"Cursitor Doom" wrote in message
...
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.

A blowlamp will not do much for a 3 inch dia bolt. A 2" propane fired
heating gun will.
I agree with your sentiment regarding heat but that depends entirely
upon the situation.

Sorry, I was speaking generically. Ideally, use oxy-acetylene as it's
true an ordinary blowlamp will struggle to provide the necessary heat
output as apart from its chemical energy, it's impossible to focus a
decent cone.