How to Remove Welding Spots from Glass

How to Remove Welding Spots from Glass

If you’re a professional glass installer, you know that some problems come with the job. One of those problems is weld spots on the glass.

While they can be removed using a commercial cleaner, sometimes this isn’t enough. In today’s post, we will discuss how to remove welding spots from glass and make your installation look flawless!

How to Remove Welding Spots from Glass

Removing welding spots from glass is not as difficult as it may seem. With the right techniques and equipment, you can remove those unsightly welding marks quickly and easily!

Step 1

The first step in removing welding spots from glass is to determine the best method. You can try any of these methods or use a combination depending on how tough the weld marks are and what kind of glass you are dealing with.


If your piece of glass has minimal scratches, rubbing it down with sandpaper may be enough to remove them. However, make sure that there is no lead paint on the surface as this will create more dust when being rubbed by sandpaper which could cause further damage!


Acetone works well for most types of glass except stained glasses since acetone melts colored pigments rather than just dissolving them as other chemicals do. Make sure not to leave acetone on the glass for more than a few minutes, as it will eat away at your piece of glass.

Stainless Steel Wool or steel wool is very gentle on most types of glass however, some glasses have glazes that can be removed by this method so always test in an inconspicuous area first!

Laser Cutter

Using a laser cutter to remove welding spots from your piece of glass ensures that you won’t damage the surface while removing them and also leaves no visible traces behind afterward! Just make sure not to get distracted when working with lasers, they are actually quite dangerous if used incorrectly.

Step 2

After you have selected the best method to use, it’s time to actually go ahead and remove those pesky welding marks! If you are using sandpaper or steel wool make sure that your glass is wet before starting as this will help lubricate the surface making it easier. After removing all of the weld lines, clean off any dust with a damp cloth.

Acetone should be applied in small amounts at first then wiped away immediately afterward with an absorbent rag. If left on too long acetone can eat through parts of your piece which could cause irreparable damage! 

Acetone works by breaking down paints so take care not to apply too much pressure when wiping otherwise you might just right through the paint altogether!

Finally, you can use a laser cutter to remove welding spots from your glass. Just ensure that the beam is running parallel with the surface and not at an angle, or else it could damage other parts of your piece!

Make sure to set the power low enough so as not to cause any heat damage but high enough so that it will actually cut through all weld marks without causing too much fire hazard. Most lasers have adjustable focal lengths, allowing more precise control over what part of your item gets cut away. Try experimenting with this feature if there are particularly stubborn areas on your piece.

Step 3

Now comes time for the final step in removing those pesky welding lines: polishing up! This may be done by hand however if you’re looking for the best results possible it’s recommended that you use a polishing machine.

Step 4

If there are any remaining welding lines or discolorations on your item, take notes about what caused them and how to avoid this in the future before finishing up! If you followed all of these steps correctly, then congratulations!

You have successfully removed those unsightly welding marks from your piece of glass without causing damage to its surface.

There you have it! By following these steps, you can easily remove unwanted weld marks from your glass with minimal effort. See our post about answering the question, can tig weld over a MIG weld and can you tack weld with a stick welder.



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