Hi;
My answer would be yes , those clothespins .Turned around and modified for what you need .Now , you can modify the tiny ones too .
Here's one I use a lot , Alligator clips .Bought in bulk at Radio Shack .( Well eight to a pack , maybe ) I solder flat brass plates on the jaws ( using silver bearing solder) .And that way they don't damage the surface .
Scratch building ships always poses certain challenges and I have made friction clamps to work by using a quarter inch of padding on each jaw surface . The reason , well some size ships are just too darned big for normal clamps .
Also take some large alligator clamps and file the jaws flat .Then file a curve on the inside of each jaw .This is for rounded parts . You can also use foam pads on them too . trouble is , they wear out sooner because of the tension . Good Luck Tanker - Builder