Take Me to Your Liter

A space ship landed on the Earth and Martians four stepped out.
They saw a human on the street and hailed him with a shout.

"On Mars I am a painter of fine homes," said Martian One.
"Nothing could make me sadder
than to see a house unpainted.
Take me to your ladder."

"On Mars I make large boots and shoes," said Martian Two.
"My shoes can stand the fiercest weather.
Wait until you see the ones I make.
Take me to your leather."

"On Mars I own a barber shop," said Martian Three.
"A fine place it is for gentlemen to gather.
I can't wait to hone a razor.
Take me to your lather."

"On Mars I weigh and measure things," said Martian Four.
"I deal with scale and meter.
I'm anxious to resume my work.
Take me to your liter."