There are as many ways to wrap springs as there are Pro-jumpers it's down to personal preferance
I personally like to wrap mine in rubber (old innertube ) and then cover them in gaffer tape (start at the top of bottom it does'nt matter )
Others like electrical tape/hockey tape and apply anywhere from 1 to 5 layers
You wont affect the working of the spring however tight you tape them
To see more methouds use the search and type something like "wrapping springs"