Can You Buff Out Scratches on a Guitar? What Polish Fixes and What Needs a Fill

Short answer: some scratches buff out completely, some only get less obvious, and some shouldn't be buffed at all. It comes down to how deep the scratch goes. If it sits in the top of the clear coat (swirls, haze, the fine marks you only see when light hits the finish at an angle), a careful hand polish will usually make it disappear. If your fingernail catches in it, polish alone isn't the right tool. Once you're through the color or down to wood, you're in fill-and-touch-up territory, and the goal changes from "invisible" to "sealed and much less noticeable."

Here's how I sort finish damage on the bench and where people make a small problem bigger.

Start with depth, not with the polish

Most gloss guitar finishes are built in layers: a sealer or filler on the wood, a color coat (or a stained top), and clear coats on top. Scratches fall into four depths, and each one has its own fix.

Diagram: a simplified cross-section of a gloss finish. Layer thickness is exaggerated so you can see where each kind of scratch stops.

The fingernail test

Drag a fingernail lightly across the scratch at a right angle. It's the standard rule of thumb among repair techs: if your nail glides over it, the mark is shallow and will probably polish out. If your nail catches, the scratch is deep enough that you'd have to cut the surrounding finish down to its depth to level it.

Then look into the scratch under a bright light. A clear or slightly gray line means you're still in the clear coat. A pale or white line on a colored finish usually means the color coat has been broken. Dark or raw-looking wood means you're through everything.

Level 1: swirls, haze and fine surface scratches

This is the wear almost every used guitar has, and it's the easiest to deal with. Use a fine swirl-remover-grade polish made for guitar finishes, a clean soft cloth, light pressure, and patience. Work a small area, wipe, and check under a light. Go slowly, because every pass removes a little finish.

From our listing for a 2011 Gibson Joe Bonamassa Les Paul Studio (currently in stock): light surface scratches on the black back, photographed under harsh light on purpose. At normal viewing distance they mostly disappear.

Black finishes show everything. The marks on the back of that Bonamassa Les Paul Studio are surface wear from normal handling, photographed under hard light so a buyer sees exactly what they're getting. On a sunburst you'd barely notice them. That's the kind of mark a careful hand polish is for.

Two warnings. First, skip the power buffer unless you know what you're doing. Buffing generates heat and removes finish fast, and edges, corners and binding are where the finish is thinnest. That's where people burn through to the color. Second, be careful with household and automotive polishes that contain silicone. Many refinishers avoid them because silicone contamination can cause defects if the guitar ever needs a touch-up or refinish later. For general care, see our guide on how to clean a guitar without ruining the finish.

Level 2: scratches into the clear coat

When your nail catches but the color underneath is untouched, the standard fix is a drop fill. You put a small amount of clear finish (lacquer, or super glue on many poly finishes) into the scratch, let it cure completely, scrape or sand it level, then polish the area back to gloss. StewMac's published method for poly finishes is medium-viscosity super glue, a full cure (overnight is better than an hour), wet-sanding up through the grits, then polishing. Experienced techs also warn against spraying accelerator on clear glue fills, since it can turn the repair cloudy.

Level 3 and 4: through the color, or down to wood

Once color is missing, the repair has two parts: put color back (touch-up paint or stain, built up in thin layers) and then put clear back over it (fill, level, buff). Done well, it can disappear at arm's length. Up close and under raking light, a trained eye can usually still find it. That's normal, and anyone who promises otherwise on a solid color is overselling.

From our listing for a 2022 Fender American Vintage II '57 Stratocaster: a small chip on the body edge. Chips like this need filling and sealing. Polish won't fix them.

Edges are where this happens most, because a Strat's rounded edges are what hit stands, doorframes and belt buckles. On that American Vintage II '57, the worn spots around the body edges were touched up with ebony stain. The stain seals the exposed wood and makes the wear far less noticeable, but it doesn't pretend the wear isn't there. On a player's guitar, I think that's the right call. The priority with any chip down to wood is sealing it so moisture and grime don't get into the grain. Making it invisible comes second.

Nitro vs. poly: why the finish type changes the repair

This is where the internet argument usually starts, and both sides have a point.

• Nitrocellulose lacquer (most Gibsons, plus vintage-spec and many Custom Shop guitars) re-dissolves slightly when fresh lacquer hits it, so new coats melt into the old ones. That makes nitro the easier finish to repair invisibly. The tradeoff is that nitro is softer, so it picks up scratches more easily in the first place.
• Polyurethane and polyester (most modern production Fenders, imports, and many other factory finishes) are much tougher, so you'll see fewer scratches to begin with. But cured poly doesn't re-melt. Fills and touch-ups sit on top of the old finish and bond to it mechanically, and the edge of a repair can leave a faint "witness line" that's hard to lose completely.

Color matters too. Metallic finishes are the hardest of all. Even with the original paint, it's very difficult to reproduce how the metal flake lies in the factory coat, so metallic touch-ups tend to show. Translucent finishes over figured tops are a close second, because you're matching color depth as well as hue.

One thing that won't buff out: clouding under the clear

Haze on the surface and cloudiness inside the finish are not the same problem. On a 2006 PRS Custom 22 10-Top that came through here, the top had the light clear coat haze you see on a lot of PRS guitars from that era. I was able to buff most of it down. The spots I couldn't fully reach were around the control knobs, which is the hardest area to work on any carved top.

From our sold listing for a 2006 PRS Custom 22 10-Top in Emerald Green: the control area. Working around knobs and a carve is where buffing gets hard.

There's a different, deeper problem that PRS owners talk about a lot: clouding that sits under the clear, often blamed on moisture trapped in the finish and most often reported on certain pre-2015 guitars. Forum reports are consistent that this kind won't polish out, because the problem isn't on the surface. If you're looking at a used PRS with milky patches that don't change when you wipe the guitar or look at it from different angles, assume polishing won't fix it and price the guitar accordingly.

My take: when to fix it, when to leave it

• Polish it yourself: swirls, haze, and light marks your nail doesn't catch.
• Pay a tech: anything that needs a fill, anything on a metallic finish, and anything on a guitar where originality affects value.
• Seal it no matter what: chips down to bare wood.
• Leave it: honest wear on a guitar you play. A well-done touch-up won't add much value, and a bad one can cost you. Buyers and appraisers notice amateur touch-ups faster than they notice the original scratch.

If you're deciding whether to fix up a guitar before selling it, light polishing is worth doing and real repairs usually aren't. Honest wear is easier to price than a rushed touch-up. If you'd rather skip the work, you can also get a cash offer on the guitar as it is. If you're shopping, you can browse our in-stock collection, where each listing describes the guitar's condition.

FAQ

Does toothpaste or car polish remove guitar scratches?

Toothpaste is a crude, inconsistent abrasive and I wouldn't use it on a finish you care about. Some automotive swirl removers work, but many contain silicone, which can cause problems for a future touch-up or refinish. A polish made for guitar finishes is the safer choice.

How do I know if a scratch is too deep to buff out?

Use the fingernail test. If your nail catches, polishing it level would mean removing a lot of surrounding finish, so a drop fill is the better repair. If you see white, pale or bare wood inside the scratch, the color coat is broken and polish won't fix it.

Is a scratch repair easier on nitro or poly?

Nitro is easier to repair invisibly because new lacquer melts into the old. Poly is harder to blend because cured poly doesn't re-dissolve, but it resists scratching better in the first place.