In my rear eject models, I just friction fit the nose. But if you want A good bond, without excessive weight, I would suggest a polystyrene cement. The thicker cements are quite effective at bonding plastic to porous materials. I've never used any of the thinner cements, which are almost entirely solvent. I've mostly used Testors liquid cement, but I suppose the stuff from the tube could work also. Testors actually makes two liquid cements, one comes in a plastic container with a metal spout, the other comes in a jar. IIRC, the stuff in the plastic container is thicker, as it has some styrene dissolved in it. IMO, one of the thinner, mostly solvent cements would be nearly useless for bonding plastic to porous materials. The thicker cements can penetrate the porous material, and leave styrene in the pores, creating a strong bond.
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