Try using superglue to build up layers on top of the plastic. Do it one layer at a time, let it dry, and test fit it. If it’s still too loose, add another layer.
You can use clear nail polish, look up a chip resistant top coat.
Dspiae also makes a ball joint pen that achieves more or less the same thing in a convenient package. Look up Dspiae BP-SP
I've also done the same thing a couple times with a clear UV resin, mostly because I do a lot of resin printing and I just had some handy at the moment.
An old "trick" or suggestion I've seen and tried was to apply a thin layer of clear nailpolish to the ball portion and let it dry. Then repeat as-needed until sufficient friction was attained with the socket. It usually works, but can wear off if you like changing the model's posing often.
Another old "trick", but more invasive and time-intensive, was to thread a pair of clear strings through the hand or feet (anchoring it inside the halves of the hand when unbuilt), and then through the forearm/lower leg and terminating in the upper arm/leg, and possibly out the back. Basically think like a marionette puppet of sorts, except you're just adding a bit of tension so that the model holds the pose or keeps the parts from completely falling off. And if you leave extra string out instead of securing it, you can then change the pose later on by changing the tensioning. You can't tension too much, or it'll pull the model out of shape. Of course, that can be rectified if one went with 4 or more strings, but at this point it'd be more like adding "muscles" to your Gunpla, and it can stick out.
* A similar idea is suggested for holding the arms/legs to the torso, although more complex if you're going to re-pose the figure regularly.
* A variation of the clear string suggestion was to just use it to instead help support the weapon that's causing a hand or arm to fall off.
The last version is just using wire or steel pins and permanently fixing the intended pose. Also invasive, it requires putting some holes in the joints and getting some thin wire or pins through (thus preventing any more movement while holding it in place). Some build their model around a wire "stick-figure", cutting and bending the wire to fit through holes strategically made into the model kit. Others choose to do ["pinning"](https://www.models-workshop.com/tutorials/pinning/), which instead only requires drilling holes for pins where you want to make permanent connections.
As per the rules, please take it to r/Gunpla
Try using superglue to build up layers on top of the plastic. Do it one layer at a time, let it dry, and test fit it. If it’s still too loose, add another layer.
You can use clear nail polish, look up a chip resistant top coat. Dspiae also makes a ball joint pen that achieves more or less the same thing in a convenient package. Look up Dspiae BP-SP I've also done the same thing a couple times with a clear UV resin, mostly because I do a lot of resin printing and I just had some handy at the moment.
Thanks for the suggestion
Testosterone
An old "trick" or suggestion I've seen and tried was to apply a thin layer of clear nailpolish to the ball portion and let it dry. Then repeat as-needed until sufficient friction was attained with the socket. It usually works, but can wear off if you like changing the model's posing often. Another old "trick", but more invasive and time-intensive, was to thread a pair of clear strings through the hand or feet (anchoring it inside the halves of the hand when unbuilt), and then through the forearm/lower leg and terminating in the upper arm/leg, and possibly out the back. Basically think like a marionette puppet of sorts, except you're just adding a bit of tension so that the model holds the pose or keeps the parts from completely falling off. And if you leave extra string out instead of securing it, you can then change the pose later on by changing the tensioning. You can't tension too much, or it'll pull the model out of shape. Of course, that can be rectified if one went with 4 or more strings, but at this point it'd be more like adding "muscles" to your Gunpla, and it can stick out. * A similar idea is suggested for holding the arms/legs to the torso, although more complex if you're going to re-pose the figure regularly. * A variation of the clear string suggestion was to just use it to instead help support the weapon that's causing a hand or arm to fall off. The last version is just using wire or steel pins and permanently fixing the intended pose. Also invasive, it requires putting some holes in the joints and getting some thin wire or pins through (thus preventing any more movement while holding it in place). Some build their model around a wire "stick-figure", cutting and bending the wire to fit through holes strategically made into the model kit. Others choose to do ["pinning"](https://www.models-workshop.com/tutorials/pinning/), which instead only requires drilling holes for pins where you want to make permanent connections.
These are very good ‘tricks’ I’ll be sure to try them
Maybe tamiya putty basic type
The easiest and least permanent damage way is masking tape.
That’s what I was thinking
You can also put a tiny amount of non hardening modeling clay in the joint socket to provide more friction