Call Roland at RBP and he will tell you the exact stuff they put on them. As for which one if you can get a deal I'd go with the RBP's because in less than a year the n-fabs started to rust. As stated you can send them back for warranty, but do you really want to go thru the hassle. I sold my stock chromes for 150.

 

bought the RBP steps through autoanything for 385 and free shipping which I thought was pretty reasonable. They look amazing.... Too bad they sent the wrong size!

 

damn that's cheap squerel.....same price as N-Fabs, at least from what I could find.

 

https://www.f150online.com/forums/me...3-dsc02326.jpg

I know you didn't ask about Westin but, I've had their Platinum series powder coat for 6 yrs. they are stainless steel powder coated so no worries about rust.

sorry I don't have a better, close up pic but I guarantee there is no rust w/ the stainless.I did do a quick touch up as the paint was getting scuffed up though. Personally, I would never go w/ nerf bars that weren't stainless.absolutely not worth it to me. My bro had rhino's on his escape and they rusted bad in less than 2 yrs. they had a warranty on them but they made him go back to the shop he bought them from which was out of business. so much for their warranty