One of my new bp's was very aggressive......when I would open the tub he would slither out of the hide and come at me.......It took a week and I hate to say it but here is what I did.
I got my motorcycle gloves out ......when he came out and got in attack mode I slowly moved the back of my hand towards him...strike...strike....and then he would ball up ....picked up...kept facing away for 10-15 minutes....gentle touch and strokes....he would strike here and there but with the glove no issues......After a week of this process he realized I was no harm.
I have heard that if they strike and you put them back or stop your attempt it reinforces their behavior.....anyways I am new to the ball world...but consistency and follow thru should work.