Speaking from very recent experience, I have to agree 100% with Achim. I was given my dad’s ‘71 pagoda. Even though it has low mileage and mechanically had been maintained, it sat undriven for nearly six years. Sorting out brakes, transmission, steering, tires, etc all needed to be addressed before cosmetics.
Now that the car is running as it was engineered, it’s time to address the interior and paint job. I've decided to only make changes when absolutely necessary and I’m attempting to preserve rather than change or restore. That’s a change from my original thinking and is in large part due to the advice I’ve been given by others far more knowledgeable than myself. You may end up feeling the same way.