I would not recommend that, especially if you plan to print multiple models.
It also depends on your filament type. Some PA6 blends can do that with little to no problems, but others will be a nightmare. I had a good try with Formfutura STYX PA6-GF30, printing on an open printer. But keep in mind that it will rely on your model being as small as possible to prevent overcooling of the previous layer.
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