Agree, WD40/CRC5-56 is the ticket for a forced soft start of a reluctant engine, When pushed, fly spray / hair spray aerosols, etc that use propane for the propellant work nicely too, and make the exhaust smell nice.
That Ether based easy start is what Meth Amphetamine is to humans, the engine will rapidly become addicted to the stuff and in a very short time refuse to start without it. A squirt of straight oil too will help in severely cold weather.