Too rusty for koni inserts?

I’m going to drop my wrx back down to at least stock height probably more of a half inch drop over stock but I’m stuck at the options for struts.

I have my old blown stock struts that I could do koni inserts in but I think they may be too rusty. They are super dirty and not cleaned up at all in these photos. I think I can get access to a sand blaster but I’m not sure how much that would remedy things.

Other option is to junk these and go for either tein endurapro (no reviews anywhere since they are fairly new) or kyb agx. Anyone want to have some input here?

Mini side note: this is my first time taking springs off and it’s terrifying at first but stupid easy. I had all springs off of these in maybe half an hour.