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Filling With 3M Wall Repair Compound


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Personal logo Panzerfaust Supporting Member of TMP writes:

Bill, another product you should try is wood filler. It dries hard yet can be sanded easily. I have thinned it with water and applied it to foamcore buildings to give them more structural integrity (a coat of elmers glue also works for that). It is great for filling gaps in paper or cardboard models. I use it to fill in the little striation lines on 3D printed models. Thin it with water, slather it on and then sand smooth once dry.


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9 January 2021page first published

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Personal logo Editor in Chief Bill The Editor of TMP Fezian writes:

I'm always trying different materials to see how useful they are on my hobby workbench. This time, I tried 3M Wall Repair Compound, which comes in a 12 oz plastic bin. It was about $3 USD when I bought it at Walmart, but I see it priced online from $7 USD to $22 USD currently (pandemic pricing?).

3M Wall Repair Compound

This stuff is interesting. You pop the lid off the container, and it's full of what looks like white dust and fibers…

3M Wall Repair Compound

When you apply this stuff somewhere, it's like spreading flour – but when you compress the stuff, it compacts and quickly 'dries' into a solid. And the fibers give it an internal cohesion.

So what can you use it for, as a miniature wargamer? First, it doesn't work well as for terrain or basework – it's hard to apply in small amounts, it doesn't adhere well, and besides pressing it into place, you can't shape it much.

Plastic bases

However, one task I run into a lot is the need to fill in plastic bases, usually because I want to attach material to the base, and just gluing it to the base lip doesn't hold very well. I've tried spackle as a filler, but it shrinks when it dries, and adhesives don't work well with dried spackle.

Plastic bases

So I tried using 3M Wall Repair Compound as a filler – just press it into place, and level it off. I found that it doesn't shrink, and adhesives seem to work better with it.

Figures with filled bases

Here are more figures, which I've filled the bases and applied LITKO pre-cut Flexible Steel self-adhesive disks. Now the figures can be safely stored on magnet-lined storage boxes!