Yes it is possible to get polish turken. I've done this many years ago.. do it just like monkey says, cross, then keep the best one and breed it back to a pure polish each generation until you are happy with the type and crest size.. The crest is not reduced or anything from the naked neck gene.
In fact, the naked neck tends to make the crest look bigger or rounder due to the contrast with the naked neck, compared to a crest on a fully feathered neck. I got a lot of positive comments of visitors regarding crests on naked necked birds, they liked the "rounder" look.
Beards/muffs otoh, IS affected by the naked neck gene.. I don't understand the whys but the degree of how the beard/muff is affected varies from bird to bird. Like, some birds will not have the beard part but they will have the muffs- looks awful lot like the big Victorian sideburns.. quite cute I thought. Others will still have the beard but "less of it".. kind of looks like Amish or a full beard on a man who shaved off the moustache and on the front of chin below the mouth, leaving just a fringe around his jaw.. Others have basically patches, two on each side of the face and two patches on the neck.. Etc. I would like to see a cross/mix of a turken with something hugely bearded like those on Faverolles though!
BTW I've crossed with Araucanas too.. it had weird effect on tufts.. on most birds the tufts had fewer feathers and dangled loosely instead of sticking straight out sideways. Looked more like dangling earrings.