Finish Checking: Friend or Foe?
That spiderweb of fine cracks in old nitro is part of the story — until it starts flaking. Here is where we draw the line.
What checking is
Nitrocellulose lacquer shrinks over decades and cracks into the fine spiderweb pattern collectors call checking. On a vintage instrument it is part of the story — proof the finish is original.
When to act
Checking becomes a problem when edges lift and flakes start leaving the guitar. At that point conservation — stabilizing the edges without overspraying — preserves both the look and the value.
The golden rule
Never overspray original finish to make checking disappear. It cannot be undone, and it costs the instrument its history and a large part of its market value.
Need Help With This?
Our licensed team is ready to help. Explore our services or request repair.
Related Articles
Humidity and Your Guitar: The One Thing That Matters Most
Most structural repairs we see started as humidity damage. Here is how to stop it before it starts.
When Is It Time for a Refret?
Divots, buzzing, and choked bends — how to tell a fret dress from a refret, and why period-correct wire matters.