Where can I find out how to play the guitar parts (tablature and/or
chords) from the Leatherface record entitled "Mush"?

Hi Bigsticks,

I appreciate you offering to pay for the efforts, I hope more
information will be forthcoming from the band as far as tabs for you.

As far as the nickname "The Boat", they make reference to it on:
Three Note Records Wesbite
http://www.threenoterecords.com/leatherface07.html

"The Boat (Boatrace- Leatherface, geddit?)"

(I didn't truly understand it, but perhaps it makes more sense to you?)

Search engine used: The one and only GOOGLE.COM!...
Keywords used: leatherface "The Boat"

Thanks so much, and Happiest of Holidays!
Mother911-ga

Hi Bigsticks, 

Nice time here around the holidays to purchase the indie lable sounds
of any band. Being impressed by anyone this interested in an indie
punk band, I had to turn as many stones over as I could. I was only
able to uncover two links for 4 songs total, but I didn't want you to
feel unrewarded for your efforts.

Link #1 is from a tab site called E-Tabs, a providor of the wonderful
types of layouts that you are seeking. Specifically at this site, "Dog
Song" and Hops And Barley Live".
E-Tabs.org
Guitar Tabs Archive
http://www.e-tabs.org/tab/leatherface

The second site might be of more use to you. Leatherface now has their
own webpresence. [ http://www.leatherface.uk.com ] One of the links on
the site is to learn to play "Not Superstitious", and "Sour Grapes".
Leatherface UK 
Official Site
http://www.leatherface.uk.com/howtoplay.htm


Of final interest to you is that the band answers e-mails personally,
and I think they would welcome a request to learn their music,
especially considering the last two tabs are clearly hand written.
There is also a lovely forum at the site where you can meet other
fans.

But wait you say, how did I find so little information. Allow me to tell you. 
Of course as anyone wanting to find anything on the internet, I used
the world's greatest search engine, Google.com.

My search terms were: Leatherface Mush Tabs

Those gave only a few short results. I was able to find a ton of links
from the third response. A wonderful website at:
The Shipyards
the un-official LEATHERFACE site
http://www.geocities.com/theshipyards/links.htm

I hope this helps in some way, I hate to see a good fan question go unanswered.
Mother911-ga

Thanks, mother911-ga, for the links! Frankie Stubbs is one of the
great songwriters of his time. And you at google answers are among the
great web (as well as non-web) researchers of your time. Can I submit
my payment for your efforts? Also, do you happen to know why they call
Leatherface "the boat"??