that stuff you get from harbor freight is junk compared to the stuff you get at caswell and the bu one get one buff prices can not be beat ....
the white has a little cutting action and should be used on either a cotton or a sprial ,,, the red has no cutting action and it a good polish and can be used on either cotton or sprial ..... as for sisal
black /sisal
brown / sprial
white / loose cotton .....
i use them all on sprials ..... when i need a good cut i use a sisal ...you may want to pick up a kit from caswell and try it out .... you get what you pay for.... ... need any help just ask some one will help you out ,,, go to caswell's main site and read the learn to buff it got alot of good ways and tips to ... the better you sand the better the part comes out ... so preping id the key to a high luster