I might add, WD-40 is regularly used as a tractor diesel/industrial diesel engine, aid to cold starting, in place of the ether-based starting aids.
It is quite flammable - but no more so than diesel - and it has the benefit of not burning explosively as large doses of ether do, which quite often results in broken piston rings.
Are commercial aerosol lubricants like WD-40 used for applications such as lubricating cabin and cockpit seat tracks?
Well, I can't answer that question precisely - nor can I definitely say it's in use in Malaysian aviation - but it sure looks like the Bulgarian agents for WD-40 are happy to recommend it for aviation purposes.
http://bomarbg.eu/wd-40_aviation.html