The miniature alien queen that got built for the battle with the power loader was equally bad. Bendy wire skeleton (I think. That was a long time ago) with foam latex skin on the outside. It had so much mold flashing that every single seam was visible. But somehow you never see it on screen.
And the Barbie. Oh man don't get me started on the Barbie.
Modern movie props are much higher quality.
Your flamethrower is looking mighty good, paulsboutique
I work in film/tv now! they aren't much better unless they are hero props for a closeup! Just smear oil and mud on it, get the hazer going and backlight it and anything looks good slightly out of focus!
If someone was really brave you could build in the parts of a super soaker on the inside! just for water not flammable fluids of course. Also maybe paint it bright colours if you are going to play with your kids in the park