Do the marks catch your fingernail? you can sand them down and buy time, keep them from damaging the seals more. But once the chrome rod is dingered, thats all you can do is buy time. It will still leak some around the dings, even with new seals (it won't be perfect). But if they are abrasive, damage has been done.
IMO, they don't look extremely rough/abrasive or deep. You should see my splitter's rods! It looks serviceable to me. Its the lengthwise scratches that really leak, anyway, the shortways ones that can be seal rippers.
Is your head gland tight? Did you install the seals the proper direction? Sometimes seals get dinged on install.
If its coming out of there "pretty good" and everything is installed right, its likely that one of the high pressure seals in the head gland has failed. Sometimes, they can put in a different seal type to help overcome sealing issues especially if your fluid gets particularly hot. The seal OEM might have been Viton and your new seal kit might have had regular seals and they are already cooked. I'm sure a hydraulic shop would love to put a rod in it for you, too! Lol.
Any more info you can provide about the system, such as the operating temperature, pressure, the seal kit source (IE... reputable hydraulic shop, China Ebay kit) type of cylinder...