Scrub it with Goof Off.
It will if the iron is very smooth, but I believe you'd get a stronger joint with epoxy.
That depends what kind of glue it is. -I would try Goof -Off for removing unknown glue from a carpet.
A cast iron tub is about 325lbs. steel is about 75lbs. Tap on tub if it sounds solid it is cast iron.
Heat it with an iron, then scrape off with a wooden spatula with sharp edge.
Goo Gone is usually good for this. Found in many hardware stores.
You can try to remove the iron on with a cotton ball that has been soaked in alcohol. If that does not work, you can try using an iron at a low heat to loosen the glue that holds it down. Scrape it off. Use a clean cloth between the iron and the jumper to try to remove some of the adhesive.
You don't, you remove the plastic junk and replace the toxic plasatic with cast iron
There is no 'iron glue', however, J B Weld will stick most iron and steel very well.
It is rare to be able to remove all of the residue. Try using goo gone on a small corner of the shirt and see if it messes up the material if it doesn't gently apply it to the glue. Sometimes soaking and gently rolling fingers over the glue will remove the stickiness as well.
The best ways to put gems on a material is to use a hot glue gun, super glue, or an iron. (heat would be the best bet because it adheres/sticks to the material better).
You can remove mineral deposits from your teapot with a mild vinegar solution.
You remove it the same way that it got on, with heat. Try using an iron on medium temperature and a dry towel. It should heat the glue and make it soft so that you can either peel or gently scrape/lift the photos from the board.