IMO, the steam cleaners are over rated. Hot water and good chemical with the correct agitation cleans. I don't know what type of surface you are cleaning though.
I have 2 fein supercuts. I use them in my biz to regrout shower stalls. I think
I paid $700 each. Yes, very expensive. I had to use a knock off one time (forget
which brand) but it was not even close to the quality of the Fein. The Ridgid looks
well built. I think Rockwell came out with one...
100% solids epoxy are all glossy. What is done is use a satin polyurethane top coat over the epoxy, then you get the look you want plus a more abrasion resistant surface.