<span style="font-family: helvetica;">That one looks to be in better shape than the other one. At least before it was recoated or whatever he did with it.</span>
These work very well, the one we have installed in the museum kitchen was almost that dirty, I just took all the pieces out of the allumium body and put it through a self-clean cycle and it cleaned up like new, Glass-beading is also a good way to clean and item like this, it did not have a smooth surface to start with.
I did a double-take with the picture of the range, we have the exact same HP range and we use the same Yates appliance dollies.
<span style="font-family: helvetica;">I have never heard of this process. Does it give it any kind of non stick property? How will it hold up to the heat?</span>
Glass-beading is a gentler process of surface blasting. It's used on softer metals like aluminum and brass, glass and plastic. It uses softer blasting media like glass beads, plastic beads, walnut shells, corn cob. I guess I missed the description by the seller of the griddle above stating it was bead blasted. Still, to me, it looks like the surface is quite rough. May be just the appearance in the pic.