I agree with Hugh on this. As long as the restoration is not a total disaster - and yours certainly isn't - I would keep it for future reference. As one learns and develops over time, it's always good to be able to go back and see the progress. Later on, the early restorations may be 'painful' to look at, but they really put things in perspective and will make you proud of how far you've come.
I don't do restorations, but I do take a lot of photos (buildings, events etc.) and when I look at my early photos, I often think "wow, was that really the best I could do back then", "why didn't I think of...", "why didn't I try this-or-that" and so on. These old 'failures' are what best shows me what I've learned.