Boy, oh Boy! I would kill for an oppurtunity like this! Since the garage is integral with the house, I would really consider a ventilation system. Back at my parents house (sounds same situation, but only a 1 car), If I just took a cap off a Gumout can they knew about it and the house got fumed out!.
For walls I would consider fire rated sheetrock/ sheathing (called greenboard around here) 4' up then put slatwall up like whats in a store so there can be a shelf or hook anywhere. For benches, I like the 4X4/ 2X6 construction, but get a sheetmetal (stainles$?) sheet with the rear edge broke up to form a 2" lip, and front edge broke down to cover the wood in front, fastened by carriage bolts.
I learned real quick about fires in shops and sheds. I was with a friend in his cedar 12X15 out building watching him work on his Gran Fury cop car, he was tacking a new trans mount (same round style used in 2wd's). All he did was no more that 10 seconds of arc time tacking the insert to the bracket. By the time he was 20 feet out the shed, it was engulfed in flames. Turned out to be a sad day! Don't weld indoors! Good luck!
For walls I would consider fire rated sheetrock/ sheathing (called greenboard around here) 4' up then put slatwall up like whats in a store so there can be a shelf or hook anywhere. For benches, I like the 4X4/ 2X6 construction, but get a sheetmetal (stainles$?) sheet with the rear edge broke up to form a 2" lip, and front edge broke down to cover the wood in front, fastened by carriage bolts.
I learned real quick about fires in shops and sheds. I was with a friend in his cedar 12X15 out building watching him work on his Gran Fury cop car, he was tacking a new trans mount (same round style used in 2wd's). All he did was no more that 10 seconds of arc time tacking the insert to the bracket. By the time he was 20 feet out the shed, it was engulfed in flames. Turned out to be a sad day! Don't weld indoors! Good luck!