Scraping Question

I recently acquired an Atlas 10 with a 54" bed. It has wear along the first foot or so of the ways. In order to scrape the whole bed back together would I require a straightedge that's around 54" long? Would a surface plate that long work if I scraped both sides in simultaneously?

Just pondering how I would go about doing it. This would be something to work up to as I don't have much scraping experience and the couple of grinding shops I've contacted haven't gotten back to me about surface...

Scraping Question