Don't know which one to use? Have two here, Texaco Starplex 2 and Multifak. Want to do U-joints / D-shaft splines and then front end. What's the difference between the two other than the Texaco literature saying almost exactly the same thing? BTW the Starplex is quite fibrous and red, the Multifak is buttery and blue/green, for what it's worth.