Gaps between parts may become apparent after assembly. To remove a gap that is too large to overlook, it may become necessary to separate the parts, adjust their fit, and re-adhere. Another option is to fill the gap with modeling putty or another substance that dries to hardness and can be smoothed and painted over. When applying putty, only the smallest amount is required. An excessive amount will be difficult to remove later and in the case of clear parts, may be impossible to remove without evident damage to the part beneath. Follow the instructions on the packaging and use a plastic tool to apply the putty, so as not to scratch the model. If an assembled part is not adhering properly in some places, it may not be necessary to separate the parts and re-adhere. Another option is to use liquid plastic cement to re-adhere the parts. By applying a small amount of liquid glue to the outside of the gap, the glue is drawn into the gap by capillary action. It is important not to apply too much glue, for the reasons above, but also because too much glue may remain outside the gap and dry to hard, malformed bubbles. In general, less than a drop will suffice. When the glue has been applied, hold the parts firmly together until proper adhesion is assured.
