First off: Happy Birthday!
It is a cool story how you got it and you're going about it right. The dimples are a pain, but some parchment paper (or similar) and some patience it can be done as wdennie mentioned. Just do small sections at a time and make sure to have other pieces installed like weldments, wireforms, posts, brackets, etc. Than dry fit that section as you go. It does take extra time, but the truth be told is that even if it is dimpled, it won't be perfect anyway. I think for all you've accomplished you got this!
And maybe you'll be fortunate and the paint/clear covered them.