I'm designing a welding station. Most tabletops I've seen are mild steel. I'm leaning toward using 1/2" aluminum plate for the following reasons:
1. Pulls heat away from the backside of a weld faster than steel.
2. Less chance to scratch stainless steel during fixturing and welding.

Other than the fact that it is softer than steel, are there any reasons NOT to use aluminum; such as excessive arcing or warping? I'll be running 200 amps max, usually in the 100 range.

Thank you in advance for sharing your experiences.