If it's not too serious you can apply a clear finish over the scratch.
All you need is a small amount of lacquer and lacquar thinner. Although keep in mind, if it's a scratch in plain site, you may never hide it completely.
Sometimes you can use a thin viscosity SuperGlue but make sure you have solvent on hand in case you make a mistake.
Best bet if you've never done this kinda stuff before is take it to somebody who knows what they're doing.