Hello coinkiboinki,
yes, you can. Skins you unlocked stay unlocked, even if you sell/dismantle the equipment piece (no matter if it's "normal" or event-related gear). Also: the price for changing a skin to an event skin is always 700 Steel, while the cost of changing to "normal" skins varies depending on the rarity of the currently equipeed skin and the skin you want to change to.
Hope that helps!
Have a nice day everyone
edit: earlier version of this post stated 400 Steel as the price, in fact it's 700.
Thank you for taking the time to comment on this thread and share your knowledge, forevergekko! It is wonderful to see our Warriors helping each other out, and I'm sure the information you have shared will be helpful to other players wondering the same thing.
I can confirm that forevergekko is correct in that you can use customisations that you previously owned but since dismantled, spanak2k19. I've just made sure of this in our office with a colleague (as they have played much more of the game than me!) and he could access and apply many customisations he's since removed from his inventory.
In case you're interested, I'd also just like to share a link to an older "How to Customise" post of ours, which may be helpful to you if you're unsure how to do it or what the limitations are. You can find that here.![]()