Remove scratches made of acrylic glass

In general, acrylic glass is one of the engineering plastics that are relatively hard. Therefore acrylic glass does not scratch as fast as other plastics. Nevertheless, acrylic glass can also scratch. However, you can remove the scratches made of acrylic very well again. How to efficiently remove scratches from acrylic glass will be explained later.

Relatively hard, but not completely scratch-resistant

Acrylic glass can be processed excellently. Especially the comparison "acrylic glass versus other plastics" clearly shows the numerous advantages of acrylic glass. This also means that the plastic, whose technical name is polymethyl methacrylate, PMMA for short, is relatively scratch-resistant. However, only "relatively" scratch-resistant, as it of course remains a plastic.

Many harder materials can therefore scratch acrylic glass:

  • Tools and knives
  • Sand or dust grains during cleaning
  • by sliding friction on a correspondingly risky ground

This allows you to remove scratches made of acrylic glass

Now you can use at least two techniques to successfully remove scratches from acrylic glass and make them completely invisible:

  • Grind acrylic glass
  • Pour acrylic glass and then sand and polish

Remove the grinding of acrylic glass to the scratch

We do not need to detail the grinding here. You can proceed as we explain in detail in the just introduced link to the guide to the acrylic glass. The important thing is that you use a finer sanding paper with each sanding cycle and finish with appropriate polishes.

Remove the acrylic glass from the scratch

The pouring of scratches, however, requires a little more effort. Scratches made from acrylic components of important appliances and machines can be completely and without any loss of security removed. As an example, here is the hood of a vehicle or a hatch of an aircraft called.

First cut the scratch into shape

First you have to mill the scratch (and cracks) in the acrylic glass. Smaller cracks are round (U-shaped) milled, deeper scratches on the other hand V-shaped. Now fill the milled groove with liquid acrylic. Each individual layer must not be higher than 2 to 4 mm. Before you apply another layer of acrylic on an already applied layer, this already existing acrylic layer must be fully cured.

Milled scratches slowly fill with liquid acrylic

This means that the solvents (which are responsible for the fact that the acrylic is even castable) have to be completely evaporated. Then build up layer by layer until the groove of the former scratch is filled with a small protruding bead. Now you have to cure the cast acrylic completely. Then you can start grinding.

Sand off excess acrylic

First use dry, then wet sanding paper in ever finer grain sizes. In the last steps, the surface is then only polished. The scratch is now completely removed from the acrylic glass.

Tips & Tricks

To be able to grind the acrylic glass really flat, it is possible to shade it with a non-soluble pen. If you grind now, you will see exactly where sanding is required. You can do the same with polishing too.

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