scratching big

If any of you saw the very long and repeated explanation of this...I am very sorry as I fumble through technology. So, I am working on some big scratchboards custom made by Ampersand. It all feels a bit ambitious and intimidating, but I love working with the liquid clay and pigments. I tend to move the big pieces around my house though in search of a space to work in and I think ultimately, the garage will do. Going from 8x11 to 30x60 is a huge jump of vantage point for me. Any advice is welcome in regards to working this size.