I used to use my old pants (jeans or cotton work pants) when
working on cars. They always split, usually because working on cars means
a lot of bending over, squatting and other awkward positions that stressed
the pants beyond their limits.
I bought a cheap pair of cotton sweatpants - problem solved. The
baggy fit allows for great freedom of movement. They can be a bit hot in
the summer, but I figure it's one way to sweat the fat off...
'86 GTI, Red of course. (exciting racey car) 260,000 miles
'87 Golf, Polar Silver. (boring work car) 529,000 miles <- Yeah, baby!
http://www.pureluckdesign.com <-Ferrari & VW stuff