When an image is complete and sized ready for printing:

• Select all;
• Choose a foreground colour for the stroke line, for example black;
• Select edit and then stroke;
• Set the width of the stroke depending upon resolution (for example 8 pixels);
• Select inside stroke, and click OK; Deselect; Select image, canvas size - increase the canvas size to suit the border required;
• Create an outer line as before;
• Select the border area using the magic wand;
• Choose a foreground colour for the border;
• Fill using the paint bucket, erring on the light side because the next process darkens the border;
• Select filter, noise and add noise;
• Choose the noise level required, for example 70, use uniform distribution and select monochromatic noise, then OK; and
• Deselect ready for printing;
• Note that the stroke procedure can be repeated by using a stepped increase in the canvas size to give a multi-line border.