Yes, you can. However, there are some things you need to consider to achieve the best result possible:
First of all, make sure that your laminate is suitable for this kind of treatment – stain-resistant and even scratch-resistant laminates should be safe but your manufacturer's instructions will tell you all you need to know about what's possible with your choice.
Even if staining isn't an option, many people still opt for light sanding now and then as it helps make their floors even more durable. This means that scratches don't go so deep into the floor (although care should still be taken). Light sanding allows a new layer of finish or wax to absorb well too (i.e. it fills up the pores in the laminate surface).
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