Another useful hand-moulded material is Sugru "mouldable glue", which sticks like you-know-what to a blanket, and leaves you with a hand-shaped silicone rubber object:
interesting stuff, thanx for the extra input & links to the other materials, I never seen it before either, & wondering how strong it is for like making custom brackets for mounting small scope gear, simple motor focusers or an extra finder ?
Can one drill and screw it to something , custom brackets etc, should be sandable for a nicer finish ?
Anywho, may purchase a small amount from J-Car, see what it is capable of ?
Another useful hand-moulded material is Sugru "mouldable glue", which sticks like you-know-what to a blanket, and leaves you with a hand-shaped silicone rubber object:
Sugru is impressive stuff. A friend gave me some and we used it for some rudimentary sharp corner baby-proofing. I also used it on my backpack to seal up some frayed straps that I had to cut down to size.
I've used Milliputt which is a two stick epoxy you cut a piece off each stick and mash them together in your fingers. It gets sticky and warm and you mould it however you want. Once set it feels like a piece of plastic and yes can be tooled to shape further. I have a tool that clips into a cover, the clip broke and I put a bit of milliputt on to reinforce the clip and 20yrs on the clip still works fine as it should, the milliput didnt crack or bend. Bunnings has a similar product these days, works the same way, think you find it with sealants.
The epoxy types are a more permanent solution, and if it fails that might be a problem. The heated plastic types may fail if they are in a load bearing use and stored where the summer heat might weaken them too. 3D printing has the advantage of being able to replace a part rather than repair so if a printed part fails you can just take it off whereas moulding to parts can be difficult to remove and start again (think removing chewing gum from under school desks).
