Making Sculpting Loops - Learn Prosthetic Makeup

Learn Prosthetic Makeup: Making sculpting loops (updated 07 Sept ‘09) 

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Making Sculpting Loops (updated 07 Sept ‘09) by Stuart Bray 

Sculpting tools are essential kit for sculpting in clay or plasteline. Usually, there 

are two main kinds of sculpting tools-the stick variety which usually are used for 

adding material, and loops which are used for taking away. They are not that 

expensive to buy, but there are some great tools which are not easily found but 

easily made. It’s fun, too. 

This article will show you how to make your own loop tools from scratch. Loops can be all shapes and 

sizes depending on the scale of the job. For blocking out life size figures, you’ll need something bigger, 

and for fine lines and wrinkles on prosthetics you’ll need something smaller. The principle remains 

the same. 

The main materials you will need are brass 

or aluminium tubing (such as the K&S 

brand) and piano wire, which are available 

from good model shops, and bass guitar 

strings from music stores. The rest is 

readily available from hardware stores. 

You will need 

Brass or aluminium tubing 

Piano wire 

Bass guitar strings 

5 minute, 2-part epoxy resin 

Wire wool or a dish-scouring pad 

Pliers 

Small adjustable pipe cutter, or a 

craft knife or blade 

(such as a Stanley knife) 

Bass strings are available in different thicknesses 

(I have no musical knowledge at all, so couldn’t 

tell you what notes to pick. Choose a selection). 

They work well as the wire-bound string 

scratches little lines into the surface of your clay, 

skimming the surface without sinking in or 

creating little scoops. 

The result is a three-dimensional cross-hatch 

effect which gradually smoothes forms without 

flattening them. 

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Step 1 

Use the pipe cutter to cut a length of brass tubing to around 150mm (6”). Cut a two inch (50mm) length 

of your piano wire or guitar string. 

Incidentally, if you don’t have a pipe cutter, 

a sharp craft knife or blade will work. Place 

the tube on a hard work surface, and roll 

the blade on the tube whilst pressing down. 

Eventually, the scored line will cut through 

the brass, creating a nice, clean cut. 

If you try cutting with a small hacksaw, very often the brass will bend and leave you with a jagged end. 

Step 2 

Using pliers, slightly flatten the end of the tubing. We want to be able 

to freely insert the wire, so make sure it isn’t too closed. If you overdo 

it, squeeze the ends gently with the pliers again to open it slightly, or 

wiggle a screwdriver in the slot to prise it open. 

Step 3 

To create a nice curve, bend your wire carefully around the brass 

tubing. If you just bend the wire, you can create a point. You can also 

use the pliers to bend the wire to any shape you like. 


Step 4 


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Check your wire fits nicely into the tubing. 

Next, squeeze two equal size globs of epoxy 

glue onto a mixing surface. Make sure it is well 

mixed. 

Step 5 

Put your mixed glue carefully into the end of your 

tubing, making sure it goes down into the tube. 

You may need a pin or a little length of wire to get 

down far enough. Dip the ends of the loop in the 

glue also, then push them into the tube about 5- 

6mm. Squeeze the tube gently again with the 

pliers, mopping any excess glue with a cotton bud 

or piece of tissue. 

You may have to hold the tool upside down for a 

while, and move it around until the glue thickens 

and begins to set. Speed this up with a hairdryer. 

That’s pretty much it. Now do the same to the other end, using a different shape loop, or use piano 

wire one end, and guitar string on the other. 

Experiment with 

variations to create 

different kinds of tool 

marks 



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Coarse and fine 

Another couple of variations are to use acupuncture needles and fret saw blades as loop material. 

Acupuncture needles are available from online acupuncture suppliers and 

health stores, and are quite inexpensive. They have both a thin wire and a 

wire bound section, so both ends can be used. This is great wire for fine, detail work. 

Fret saw blades are available from hardware stores, and are good for more coarse work, when blocking 

out shapes and smoothing larger forms. 

You need to use a blowtorch to heat the blade white-hot in order to successfully bend it, otherwise the 

brittle metal snaps. 

Twist & Shout 

Another variation is to twist some wire to create another kind of rough texture which is excellent for 

raking. Use piano/music wire or something a little less hard if you find it too tough to work. 

Cut a 300mm (12”) length, and fold it in half. 

Put the ends into the jaws of a pair of pliers, 

molegrips or metalworking vice. Insert a tool or 

strong rod such as a screwdriver in the loop. Now 

you can grasp both ends of the wire 



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Twist the ends in opposite directions, working 

against the resistance of the wire. 

Keep going until the wire starts to buckle and 

loops onto itself. When it looks like the picture, 

you’re done twisting. 

As before, cut the wire to size, being careful to 

create the loop by bending it around something 

circular in profile, such as a round handle on a 

vice, a paintbrush or a battery. 

Insert the ends into the slightly flattened tubing, 

and apply adhesive. If you want, you can crimp it 

in place instead or in addition to the adhesive. 

If you don’t have a crimping tool, you can use a pair of pliers with a 

crimping device in the jaws, as shown above left. 

Make sure that squash the middle area between the two twisted prongs, 

as shown in the middle picture. Once you have squeezed the jaws tight, 

you should have a nice clean groove in the end holding your wire firmly. 

Make thicker versions with extra wire. In the picture on the right, I used 

two loops of wire at the same time and repeated the procedure. Do this to 

create tougher loops for larger tools or for working with firmer sculpting 

material. 



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And, finally… 

Here is a variation using the same techniques using brass square section rod. I have chosen to use 1/16 

and 1/32 gauge from K&S. The shot on the right just shows you a comparison of sizes. 

1/32” 1/16” 

Cut yourself a decent amount of brass rod to work with-here I used about 65mm (2½”) to make this one. 

Using molegrips, pliers or a vice, slowly twist the brass rod in opposite directions. 

Make sure they there is plenty of the rod in the jaws to be able to grip the brass while twisting, and 

maintain a firm grip whilst you do it. Molegrips or a vice are best, as this grip is held in place 

mechanically rather than by the strength of your hands. 

Keep twisting slowly until you end up with something that looks like this… 



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…and then bend your twisted brass into shape before 

inserting into your tube and fix as before, using an 

epoxy resin glue, crimping or both. 

Voila- the finished twisted brass loop tool. These 

work really well with plasteline and clay, and should 

give you years of excellent service. You may as well 

make a few once you have all the bits you need. That 

way, if you lose or break any, you can just grab 

another to keep sculpting. 

Have fun experimenting with different shapes and 

sizes, and create your own customised sculpting tool 

kit. If you ever break or lose any of your tools, you’ll 

be able to replace them with ease. 

Happy tool-making! 

Stuart 

Having trouble finding materials 

Maybe it has a different name or supplier in your country 

Is there an alternative 

Drop me a line at mail@learnprostheticmakeup.com, and I’ll 

do my very best to help you. 

Questions or comments about this article 

Get in touch at www.learnprostheticmakeup.com 

Take care whenever working with makeup materials. 

Familiarise yourself with the products and take appropriate 

health and safety measures. We suggest you obtain and 

consult the relevant MSDS (Material Safety Data Sheets) from 

your supplier whenever possible. This article is for your 

information only. We cannot accept any responsibility for 

your actions. 

©Copyright Stuart Bray 2009 

Photographs © Jane Hobson

Making Sculpting Loops - Learn Prosthetic Makeup

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