Hello Stuart, the silicone will not penetrate very well. Here is an old gas
station lube rack trick you might have better luck with. Get about a 1/4 cup
(don't worry about the proportions to much) of parts washer
solvent-thinner-kerosene (NO GAS), and mix it with a cup ATF, put it a spray
bottle and go to town, just flood it! The thinner will penetrate through out
all the nooks and crevasse carrying the ATF with it. When the thinner
evaporates, it leaves the ATF to lube. Back a 100 years or so this was SOP
on cars and trucks of the 50's & 60's with bushings and no grease fittings.
Of course you will need to replace the bushings at some point, this might
stop the noise till then.

good luck

Howard

-----Original Message-----
From: Stuart MacMillan
Sent: Thursday, February 26, 2015 7:23 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: [VANAGON] Squeaking front bushings

I've sprayed silicone once with no effect, so I'm going to keep at it a few
more times!

Stuart