I'm pretty new to these kind of builds, but I do a lot of exterior/interior/engine work to 4x4s as a hobby and I'm sure the skills somehow overlap. I find a lot of DIY stuff often does. I've fixed cracks in plastic items using plastic welding a couple times, but I'm no plastic expert.
Anyway, I have this polymer handguard. I already need to cut it back quite a bit because I already have this one, it's brand new, and I'm poor, haha. So what I'm trying to figure out is this. The hand-guard (like nearly all others) has a type of "skeletonization pattern" for like M-lok or whatever. If I wanted to fill some of that in and sand it and really make it exactly how I want it what should I use? I'm asking here because there might be some kind of epoxy that is commonly used by you folks for this purpose. I want to find something that could (theoretically) allow me to make all the walls of the hand-guard solid if I wanted to. I probably won't do that, but I want to know what I should use if I wanted to. Is there a way to do it where it could then be drilled out again and retain it's structure as well as the unmodified portion? If so, then I could give it an M-lok slot further back how I need it. I mean, maybe I should treat it *exactly* like plastic-welding, but I'm not 100% sure of that so please let me know. I don't mind taking my time and investing a lot of time into it. Maybe I'm just a masochist, but I find that kind of thing fun.
Thank you