PE problem--Help!

I am in the process of assembling the Italeri 1/35 M101 105mm towed howitzer, and I have the Eduard PE set for it. The other night I was gluing the PE hinges and mounting braces to the inner gun shields (all Eduard PE), and with any manipulation at all, the pieces would pop off! So, I removed, what I assume to be, the dark oxide coating with some sandpaper and reglued (using CA). Popped off again. Re-attached using 2-part epoxy. Popped off again. Reglued with CA again, and let dry for over 24 hours. Put hinges in PE bender to bend both at correct angle so I could attach the upper shield, and you guessed it, popped again . Got everything glued back together (CA), and for now it's holding, but I'm concerned it'll all pop again when I start drybrushing, and I still have a lot more stuff to glue on! (Sometimes I scuff pretty vigorously when weathering). The CA is a thin (not gel) Loctite product, and is brand new. The epoxy is Conap, and I use it to hold golf club components together. Short of stick welding, how do I get the PE to stick and stay stuck to itself Help!!

Please keep in mind this is a PE-to-PE bond (or severe lack thereof), not PE-to-plastic.

I've posed this same question to all the folks over on the dark side. Thanks in advance for any and all help.

Gip Winecoff