Problem black speck on acrylic

Scratch at it with a really sharp razor blade. Then when you see the huge scratch you can feel better about throwing the plexiglas away!

Actually, is it in the plexi or on it? Is it defect in the plexi itself, like bubbles in CC glass. If so then there may be little you can do. "digging it out" will do as I was joking about above and render the glass useless. If it is on the plexi then you may be able to lift it with tape, or drown it in cleaner then rub it off. I use a little alcohol letting it sit then wipe it off.
 
Hello lil black specky

Ah my favorite, the black speck, try a black mat!!!
usually it's in the plexi, all hope is lost, loose your turn and go back to START.

Bob I ran across a master thesus once that was all about how alchol (I used to use rubbing alchol) would cause plexi to form tiney web like cracks, I bet you've come across that before.
 
Ah my favorite, the black speck, try a black mat!!!
usually it's in the plexi, all hope is lost, loose your turn and go back to START.

Bob I ran across a master thesus once that was all about how alchol (I used to use rubbing alchol) would cause plexi to form tiney web like cracks, I bet you've come across that before.

So that's where the spider lines came from :)
It feels like it is in the acrylic not on it. I guess I need to cut a new piece. I was afraid of that! This is one of those jobs that I can't wait to get out the door.
Thanks for the replies...back to work.....


I hate that with plexi, as it is covered and you can't see it before you cut it out. Sometimes you can call whoever sold it to you and get a refund. After peeling off the paper it isn't like you can realistically cut it down and use it for another job.
 
If it is in the acrylic, wrap that baby up and ask for a refund. With oil prices through the roof, we can't afford to waste a sheet of acrylic.
 
The black speck is very likely a carbon spot in the acrylic. Call your distributor and get credit for the sheet or the flawed part. The carbon spot is not removeable it is in the acrylic sheet.

About the ALCOHOL !!!!! Do not use rubbing alcohol on acrylic it can cause crazing (those funny little crack marks that can spread and destroy the acrylic) If you have a sticky substance on the acrylic, like tape you can use a solution of 1/2 water and 1/2 DENATURED ALCOHOL. Never spray it directly onto the acrylic, instead spray it on a cloth and then clean the area. This solution will clean finger prints off very well also. This should only be used in case of an extreme problem as it is an extreme method. Normally use Novus or any acrylic cleaner. The other product that will eat up acrylic is acetone. Unless you plan to destroy the acrylic NEVER use acetone to clean. Are we clear on all that now? Alcohol is for the most part better used in a good drink (that would be the distilled type of course)
 
I don't know what Unstik is made of so I can't answer the question. Give me the explanation of what the product is and what it was designed to do and maybe I can help.
 
I don't know what Unstik is made of so I can't answer the question. Give me the explanation of what the product is and what it was designed to do and maybe I can help.

It is an Adhesive Releasing Solvent. Contains Benzene and Toluene..ya know, those wonderful carcinogens. You have to keep it off your skin and try not to breath it. :faintthud: Works well to get rid of sticky stuff off of alot of things.
 
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