Guides
Basic modelling
techniques
The more kits you build, the more you will develop your own technique
and style. Each person is different in the way they approach the
building of a model and so the following techniques are intended
as a guide for the total beginner who has yet to develop techniques
of their own.
That
said, there may be ideas below that prove useful to those who are
proficient at model building. It certainly never hurts to learn
about how other people approach their modelmaking. If you have specific
modelling questions that need answering or techniques you'd like
to share with other modelmakers, why not join the
forum?
Injection
Moulded Kits
Always
cut the component from the sprue using a craft knife, a pair of
clippers or a pair of scissors. Cut close to the component. Never
tear or twist them off as it can cause damage to the parts.
If
using a knife to cut sprue it is best to make sure that the component
is supported whilst cutting, as sometimes the shape of the sprue
is such that it holds the component off the surface. Cutting straight
down onto the surface without support runs the risk of snapping
the part before you actually cut through the sprue.
Once
a component has been removed from the sprue, the excess plastic
can be trimmed off with a scalpel or knife. Clean-up work can then
follow with a needle file or abrasive paper.
If
you find you have to remove a series of components from the sprue
that aren't numbered but need to be assembled in a critical order,
get a piece of plain paper and write the number order on it, then
place the appropriate components next to the correct number.
When
using liquid polystyrene cement, dedicate a fine paint brush to
applying it. Never apply the cement directly from the tube. Bottled
cement sometimes comes with a thick brush as part of the lid but
using a fine brush allows the accurate placement of the cement,
even in hard to reach areas.
If
you accidentally spill cement onto an area of your model, do not
touch it. Instead, run it under a cold water tap as this prevents
the cement from attacking the surface further still.
Whenever
possible, apply cement to the inside surface of joints to be bonded.
This helps to protect outer surfaces from damage.
When
waiting for cement to set, use masking tape, elastic bands, clothes
pegs, bulldog clips, etc to hold the components together, freeing
your hands to get on with the next stage of your build. There are
also a number of clamps available to buy from hardware stores.
Clear
components, such as cockpit glass, can be glued into place with
white glue instead of polystyrene cement or superglue. This eliminates
the problem of rising vapours misting up clear components.
Vac
Formed Kits
Unlike
injection moulded kits, vac formed components are supplied as a
series of pieces moulded onto several sheets. Separate them from
the sheets by cutting or scoring with a knife, close to the edge
of the part where it joins the main sheet. If the plastic is too
thick to safely cut through, partially score the plastic with a
sharp craft knife and then carefully snap the waste plastic away
from the component.
Vac
formed kit components don't have locating tabs so you will have
to add your own. Don't throw the scrap plastic that surrounds the
component on the moulded sheet away - use it to make your locating
tabs!
Poster
tack or Plasticine proves useful when building vac formed kits.
For example, it can add weight to the model or hold pieces in place
while they are glued or painted.
Resin
& White Metal Kits
Although
made from different materials, resin and white metal kits are similar
in the way in which they are constructed. Both usually have casting
blocks on the components that require removal before construction.
To remove small casting blocks use a craft knife or a scalpel. To
remove larger casting blocks, use a razor saw.
Resin
and white metal respond well to filing and sanding but you can also
use a scalpel on both to shave off excess material.
Some
manufacturers produce 'accelerators' for superglue and these can
prove useful when gluing metal and resin parts, ensuring a strong
bond.
Vinyl
Kits
The
treatment of vinyl kits is largely the same as the other kit types
mentioned but the one significant difference is that they retain
their shape when heated with a hairdryer. The heat softens the vinyl
up slightly, making it easier to cut.
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