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Removing Welding Stains From Looking Glass

11/12/2011 3:51 AM

Hi!

Can anyone tell me that how to remove welding stains from looking glass(window). it has created black rough spots on whole glass and seems like mosquitos have been killed on glass;-)

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#1

Re: removing welding stains from looking glass.

11/12/2011 4:49 AM

I would guess it's actually melted into the glass in which case the most cost effective solution is new glass, or simply ignore it.
Del

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#9
In reply to #1

Re: removing welding stains from looking glass.

11/13/2011 3:46 PM

It is indeed melted into the glass. I have seen 10's of thousands of dollars worth of glass replaced because the welder from the precast company wouldn't protect the glass while welding the mid connections. Six months later the final cleaning crew discovers it and all the burn marks point straight up to the brackets hidden behind the ceiling tiles. Anyone with a grinder or a gas cutoff saw can and has done equally as much damage. Cutting rebar from the top of a brick balcony wall ruined the entire length of a town house project's sliding glass doors and windows. Taking out a trucks' windshield and paint job has been known to happen too. Some of this is hard to ignore!

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#2

Re: removing welding stains from looking glass.

11/12/2011 7:14 AM

Glass polish will remove the black burn mark but it will do nothing to remove the pitting cause by the slag. You may try tooth paste as it has fine abrasives in it as a polishing compound. Polishing compound will notremove any slag that melted in to the glass that is stuck there. You maybe be able to pry the slag out with dental pick or break them up. The little round balls of slag are usually hollow and brittle. Other then that Del answer of replacement is the course to rectify the problem.

Note in US industry standard any defect in window glass that can't be seen from 10 feet distance is okay. Then again customer always right or the wife which ever the case is.

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#3

Re: Removing Welding Stains From Looking Glass

11/12/2011 8:53 AM

The best solution is to place a thin transparent glass in front of the shielding glass (as a sacrificial goat?), which prevents slag and debris hitting the shield glass. Keep a few of those handy and change as needed.

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#10
In reply to #3

Re: Removing Welding Stains From Looking Glass

11/17/2011 6:56 AM

OP wants to know how to remove it not how to prevent it. Even though your solution to prevention is correct as to how most welders protect glass. You changed the scope of the question.

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#4

Re: Removing Welding Stains From Looking Glass

11/12/2011 3:48 PM

The usual setup is an expendable clear plastic cover lens in front of the shaded glass lens.

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#5

Re: Removing Welding Stains From Looking Glass

11/12/2011 9:43 PM

Tornado comes with a good solution.

You can also spray an "anti- spatter" solution (comes in spray cans) on everything that you do not want to be affected by the slag. Your glass included.

Cleans very well, especially if you watch close- by and your glass get also "smoked".

The film is very transparent and stays wet.

This product is also good to spray in the guiding hose of the MIG torch and provides more resistance against melting down or burning the tip.

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#6

Re: Removing Welding Stains From Looking Glass

11/12/2011 10:40 PM

Nothing you can do except change it or live with it. You should not have listened to the expert welder who had come to install safety grills on your windows.

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#7

Re: Removing Welding Stains From Looking Glass

11/13/2011 6:16 AM

Hi

I use a Stanley blade to " de-spatter " the windows in my workshop, it removes the spatter but does not scratch the glass. Also do the same with my welding helmet, even though I use a sacrificial plastic shield some spatter invariably gets past and sticks to the glass.

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#8
In reply to #7

Re: Removing Welding Stains From Looking Glass

11/13/2011 11:01 AM

Also use the same method to remove weld spatter from my eyes

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Brian Falconer (2); Del the cat (1); ducon (1); dvmdsc (1); furio (1); Onthebeach (1); ozzb (2); Tornado (1)

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