If the laminated document has spots on it, it is possible that the rollers may have small deposits of adhesive on them from previous laminating. .
GBC Laminators are great quality products designed with the user in mind if you require product for moderate, regular or heavy usage, and even supply roll fed products for professional applications. GBC laminators can be supplied with technical features including QuickStart which has your machine ready for use in a very short space of time. GBC also offer the widest range of high quality laminating supplies and consumables guaranteeing quality results.
If you need help selecting a model, you can download a handy Fusion Laminators Buyers Guide here