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Painting Glass Blocks

Category Painting
Using the wrong paint on your glass block project can be disastrous. This is a guide about painting glass blocks.
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Ask a QuestionHere are the questions asked by community members. Read on to see the answers provided by the ThriftyFun community or ask a new question.

By 0 found this helpful
October 5, 2017

How many coats do you have to put on to get proper coverage so your brush strokes do not show with lights inside the block?

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October 5, 20170 found this helpful
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At least two. After the second coat dries, hold the block up to the light. If necessary, apply a final coat.

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October 5, 20170 found this helpful
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Steps for painting on glass:

  1. After you have etched or frosted the glass transfer your design to the glass.
  2. You will need to undercoat the area with black gesso first.
  3. Apply the first undercoat of black gesso to the glass block and let it dry.
  4. Put a light inside and see if you can see your brush strokes, or light shines through.
  5. If this happens, you will need a second coat of undercoat.
  6. Once you no longer see your brush strokes or light shining through you can start painting your design.
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October 6, 20170 found this helpful
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I'd use a primer then two coats of paint.

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By 0 found this helpful
November 4, 2008

What kind of paint do you use to paint on glass blocks?

Steph from Indianola, IA

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By Artlady (Guest Post)
November 6, 20080 found this helpful
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If you etch or sand the surface, you can use any kind of paint. If not, I'd suggest glass paint. Even then, it will scratch off unless you seal it with numerous coats of clear sealer.

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I've found the most durable way is to etch the surface. Paint sticks better to a rough surface.

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November 8, 20080 found this helpful
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I would use "Glossies" by Liquitex, it's sold with the higher-end artists paints, not with the crafters paints at Michael's craft store. This stuff is made to paint on already glazed ceramics, glass, window, tiles & other surfaces like that. It's so strong that I painted a set of juice glasses for my son & after he ran them through his dishwasher for over a year, they still looked like brand new!

* A note: Glossies dry faster than other acrylic paints & they tend to darken a bit after they dry. Don't add to much water to them. Read the directions on the back of the bottle. Remove any mistakes with alcohol,

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---> Be sure to first wash your hand to remove any lotion & naturals oils, then wipe down the area to be painted with rubbing alcohol & a soft cloth or paper towel.

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By 0 found this helpful
November 6, 2017

I am painting glass blocks for Christmas gifts. I want to paint a picture and frost the block. Do I frost first and then paint? Or paint the picture and then frost over the whole block? I have seen where they frost over vinyl, but I am not sure about over a painted picture. Thanks.

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November 7, 20171 found this helpful
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Paint first, then frost. A store like Michael's will have the supplies you need.

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