Hi Shaz
ok so it looks like the Renshaw is the UK modeling paste.. I did a search and it seems Nicholas Lodge says this is like his recipe, but available commercially .. so I’m sure it should be good and not crack!
Maybe if you try the Ziploc bag or plastic wrap to keep the air off it and also you could grease your hands with a small bit of shortening to see if that would help!
I’ve had good success with satin ice being smooth/not cracked but like I said it is too soft and takes too long to dry! so then I get drooping issues. Maybe I will buy some of the renshaws to see if I like it! Although since I’m in the US it may be harder to find.
Good luck with your modeling!
