I'm looking for the title of an old sci fi movie I watched as a kid.
all I can remember was a bunch of military guys who found a flying
saucer inside an old barn or church. the only way they could get
inside was when someone turned on an electric razor and a secret door
opened.

I believe your movie is a 1968 film called "The Bamboo Saucer," also
known as "Collision Course." The plot involves a flying saucer found
in Red China inside an old church (which also was used as a barnyard
for farm animals). Scientists discover by accident that the buzzing
sound of an electric razor will cause a door to open.

Here are a few online plot summaries:

"The Bamboo Saucer (1968)
A team of American scientists, under the leadership of a military man,
go to Red China to investigate the report of a downed flying saucer.
They encounter a similar Russian team with the same object. The two
are forced into an uncomfortable alliance to avoid the Chinese army.
They find the saucer in the ruins of a church; the local villagers
hate the government for killing the priest. They work together to
figure out how the saucer works. In the end, as most of the expedition
dies fighting off Chinese troops, three of them make their escape in
the saucer. In keeping with the 'lets end the cold war' spirit of the
film, they agree to take the saucer to a neutral site, Switzerland."

Classic Sci Fi: The Bamboo Saucer
http://www.classicscifi.com/index.php?option=com_csftitle&Itemid=40&title=Bamboo+Saucer%2C+The

"There are way too many convenient solutions present in this film,
such as our scientists accidentally uncovering the secret of opening
the UFO's door, the UFO's landing in a church, the scientist luckily
hitting the right control buttons on the UFO at the right time."

SciFilm Reviews: The Bamboo Saucer
http://www.scifilm.org/reviews2/bamboosaucer.html

"A flying saucer hidden in a Red Chinese peasant village is sought by
teams from the United States and U.S.S.R. On finding it, they band
together to explore the saucer and take a trip into space."

Amazon: The Bamboo Saucer
http://www.amazon.com/Bamboo-Saucer-Movie-Frank-Telford/dp/B00000F29Z

My Google search strategy:

Google Web Search: "the bamboo saucer" duryea
://www.google.com/search?hl=en&q=%22the+bamboo+saucer%22+duryea

I hope this is the right film! If it is not, or if anything is unclear
or incomplete, please request clarification; I'll be glad to offer
further assistance before you rate my answer.

Best regards,
pinkfreud

thank you very much