Vacuum wiper motor

[Swank]

Little over a year ago, i took apart the vacuum wiper motor, cleaned it out, put new gaskets in, threw a little brake fluid in as talked about on various websites, and let it sit around til i got the engine back in the car.  The paddle moved fairly good but i dont know if the motor ever worked cause i didnt have vacuum to put on it.   Got it out recently and it was seized up tight as a drum.   Took it apart again, cleaned it out, pryed out the paddle, put a little 600grit across the bowl.  Let the paddle dry out for a few weeks.  The paddle part is still very tight in the bowl.  Put a little marvel mystery in it and it will not turn by hand, have to use pliers. 
Seems most people put brake fluid in it to soften up and expand the paddle seals, ...i need the opposite. I can barely push the flapper into the motor.
What can i put in here, or do to this thing to get the paddle moving freely?

[Jeff Norwell]

I use Fluid Film on everything.Unlike a penetrant like wd-40..... FF will never evaporate.
On Both of my 57's the whole wiper cable system where locked frozen... after lubrication and letting them sit for about 12 hours.I could freely turn the units with my fingers.
A few years back I bought a loaded 312 from a lady who's husband passed.The 312 was rebuilt about a 20 year period and never fired.Everything internally was coated in FF and kept all very nicely coated and lubed.Non-poisoness as well.I swear by it.
good luck.