If it were my bike and it had sentimental value to me, I'd probably have the frameset powder-coated.
Start here -
https://www.tiger-coatings.com/us-en/shop/
You will need to do some digging to find a powder coater in your area, preferably with a long history and a readily-available CV. They don't need to work with the Tiger Drylac line but they should have a good variety of coating chemistries and colorways available.
I've used these people before, with good results -
https://www.facebook.com/kingcoatings/