Document tiny white specks by comparing their positions with the source artwork and looking for a repeatable pattern, without touching the printed surface. Their appearance alone does not establish a cause. Compare the area with the approved image and examine whether the marks follow the picture's highlights or occur independently of the design. Document what you see before rubbing, repainting or applying a coating, because even a small intervention can obscure useful evidence.
Compare the marks with the authorized image
Open the actual source-file revision used for the canvas, ideally at a scale close to the printed detail. Snow, stars, reflected sunlight and deliberate speckled texture can look like scattered missing ink. If the bright points appear in the same locations and have the same shapes in the artwork, they may be intentional. Remember that a textured fabric surface can make very small details appear more irregular than they look on a smooth monitor.
If the marks are absent from the approved file, consider their distribution. Are they clustered along one edge, scattered across dark zones or repeated at similar intervals? A single isolated dot may have a different explanation from a long row of pale gaps. Note whether the speck is flat, raised, shiny or associated with a scratch, but do not scrape it to test texture. A printmaker or conservator may need to examine the actual material.
A dark mountain panorama contains dozens of bright points. Most match stars in the approved file, but three new pale dots sit in a black foreground area and two cluster at a corner fold. Mark the suspect locations on an annotated copy while keeping the original photograph unchanged. Include an overall view, scale-safe detail images and a note about the lighting. A print technician can review whether those marks arose from image data, fabric, finishing or later contact. Painting over them immediately would conceal evidence and might alter nearby color.
Record the evidence without changing it
Take an overall photograph first, with the canvas aligned so its full orientation is clear. Then photograph the relevant area using diffuse light and a close view that still shows nearby features. Record the date, device and lighting setup. Strong flash can exaggerate reflective flecks or hide subtle surface differences, so do not treat one dramatic image as conclusive evidence. Keep unedited photographs alongside any annotated copies.
If a mark is difficult to show, describe its position relative to stable image features rather than drawing on the canvas. A small numbered diagram or digital annotation can help identify several spots consistently. Include the exact approved proof and note when the issue was first observed: at unpacking, after installation or much later. This timing can guide investigation, but it does not by itself prove that packaging or printing caused the change.
Let the cause determine any remedy
A genuine unprinted area may require a production review; a loose particle may call for an object-specific surface assessment; a scratch or coating loss may need a conservation opinion. Those are different problems and should not receive one generic correction. Avoid household markers, paint, solvent, wet wipes or self-adhesive patches. A casual touch-up can change gloss and color, making a tiny spot more noticeable and potentially damaging a sensitive print.
Ask the responsible producer for the material and finishing information necessary to evaluate the mark. If the work is valuable, signed or otherwise sensitive, get appropriate specialist advice before any intervention. A photograph cannot always distinguish contamination on top of a coating from a missing image layer below it. Nor can general guidance confirm that Wallpics uses any particular ink, fabric or protective finish.
The practical goal is an accurate record that supports the right decision. Compare the source, describe the pattern, preserve the condition and seek an informed explanation. Some specks will prove to be part of the image; others may indicate a production or handling issue. What matters is not making the smallest mark disappear immediately, but avoiding an irreversible correction before its nature is understood.