You're the first guy I've seen mention using 2-part methacrylic adhesives for structural work on models. They have killer properties for certain applications, to me their claim to fame is the ability to bond unusual combinations of substrates very effectively, i.e. aluminum to composites, aluminum to ABS are two I've used it for commercially with good success. No better than anything else on low surface energy plastics, like PE or PP though. It's not too resistant to glow fuel either.