>>5998827>>5998832Counter intuitively enough, thin cement is better than thick one. The difference between them is the amount of added resin and the resin doesn't seem to mix well with plastic. You want to be as close to pure solvent as possible.
>>5998831Yes, putting cement under it (and over it) to soften up the whole thing helps adhesion, but you really wouldn't want to do it where you have surface detail nearby.
It works for filling gaps and holes on the underside of the part where nobody will see it, but that's about all it is good for imo.