Painting the Inside of a Glass Block?

Glass Block on white background.
While many crafters paint the outside of their glass blocks it is possible to paint the inside. One method is to pour a lot of paint in through the opening, swirl it around the block and then turn the block upside down to drain and dry. This is a page about painting the inside of a glass block.


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July 2, 2017

Can I use glass enamel paint on the inside of a glass block? I am trying to avoid brush strokes.


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July 4, 20171 found this helpful
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Did you really mean you plan to paint on the "inside" of a glass block? Or did you mean the outside? I do not think I have seen anyone paint on the inside but maybe you have found a way.

There are lots of sites that give instructions for painting on the outside of blocks but most of them recommend "roughing" up the glass first if you want a truly lasting paint job. I believe most people are using either spray paint (and doing this correctly takes practice) or they are working with some sort of sponge.


Streaks don't usually show up until a light is placed in or behind the block.

Just in case you are wanting something inside the block then you will probably have to drill a larger than normal hole in the side of the block. Here is a link that has some good instructions for inside and out side of blocks.

Here is a link to a free e-book that has a lot of information on this subject. It is a PDF file and is safe to use.

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July 3, 20171 found this helpful

Glass paint does come in a spray to avoid brush strokes.

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July 13, 20170 found this helpful

Pour a lot of liquid paint inside the glass and then turn it in many directions to coat the inside then drain the excess out the hole. Leave it upside down on a rack to drain and dry for several days.

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January 3, 20180 found this helpful

My paint seems to run down the sides before drying, even though I'm draining the excess paint.

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