UFO is a different product. You've gotten 2 different classes of polishes mixed up.
Xtra Shine is what's considered an extender polish. One can define an Extender as a polish that uses finer grit levels of their micro-abrasives than a regular polish like Reacta Shine.

UFO is called a slip agent polish. There aren't many of them. Others that I know of are Neo-Tac's Control-It and Powerhouse's (used to be Track's) Delayed Reaction. These contain "something" that clogs the pores of reactive resin coverstock, reducing their ability to absorb oil. This ability is most of what makes them hook. So balls with this polish applied will go longer but unlike regular and extender polishes, this also makes them hook LESS and have less backend. That something in Control-It and Delayed Reaction, is, I believe, silicone; once applied it is there for good OR until you sand it off with a fairly rough pad, like 500 grit. UFO is different in that it uses an organic agent (I don't know what it is exactly) to clog the pores. It last about 20 - 25 games and can be removed much more easily, like with a 4000 grit pad.

All of these will polish a ball. I have used UFO, Control-It and Delayed Reaction at times, but I tend to stay away from such compounds that affect my carry power. That's just me; that may do what you need. I would only apply them to balls that are already very weak (Tropical Storm, for instance) when conditions get really dry and you'd rather not go to a urethane.

Xtra Shine is one of my favorite polishes of all time. You can use it like any other polish and vary the results from 2 directions: the underlying grit level and the amount of polish you apply.

Hope this helps. If I can be of any further assistance, please just ask. If I haven't answered your question well enough, I'll be happy to add more, if I can.

UFO doesn't help a plastic ball except as a polish. When used on a plastic, its effect is the same as any other polish.

UFO doesn't help a plastic ball except as a polish. When used on a plastic, its effect is the same as any other polish.

My spare (w/core) hooks on dry and is tracked, the UFO helps hide it. Was I wasting good polish on my spare? I should used left over secrets sause since I don't use it.

Thanks for clarifying that for me, I meant ufo and the like had slip agents. I posted this hastily and forgot the facts....
Anyway,I have a good pearl,purchased a used Wisdom and drilled it up weak,and had my driller put it on the haus machine,but apparently it was still too strong for what I wanted to accomplish,knowing I was gonna be on a known dry set at my lanes. I had been wanting a weaker ball just for this but it's back to square one,unfortunatly.
Probably gonna score the ufo and have it to where the wisdom will cover a few boards and I can basically play straight up when the heads start to go.
 

I'll get some 3M finesse it II just for the spare ball or even cheaper, the Motiv power gel polish.. save my UFO, great stuff!

I myself have used the snake oil and the UFO both are great products when I've used ufo i generally see on avg  about 2 ft added length on the lanes of course there are always some variables that will make a difference but it's a added help if your playing the burn

Thanks for clarifying that for me, I meant ufo and the like had slip agents. I posted this hastily and forgot the facts....
Anyway,I have a good pearl,purchased a used Wisdom and drilled it up weak,and had my driller put it on the haus machine,but apparently it was still too strong for what I wanted to accomplish,knowing I was gonna be on a known dry set at my lanes. I had been wanting a weaker ball just for this but it's back to square one,unfortunatly.
Probably gonna score the ufo and have it to where the wisdom will cover a few boards and I can basically play straight up when the heads start to go.
 

You're welcome, of course. I like UFO because it only lasts 20 - 25 games and is easily removed. If you're sure that the oil or lack thereof is going to last a long time, by all means, use one of the others. Actually I believe Delayed Reaction has been discontinued, but many pro shops probably still have a bottle somewhere, if they had it at all.