As Bogeyhunter remarked, there is no guaranteed way to beat an LP-player. If you want to win, you have first of all to let go of the notion that there is some way to win of everybody. There are a lot of different LP's around and there are even more different ways of playing with them. For instance, since the ban on frictionless pips it is plain stupid to think that offering an LP-player no-spin balls will do you any good - every LP on the market today will have friction enough to kill that kind of ball. So if you are counting on blind mechanical spin-reversal, you simply don't know what you are dealing with.
There are, roughly speaking, three kinds of LP's.
The first kind is low-friction. Examples: Palio CK, Double Fish 1615, Friendship 755, DHS C7. These LP's will reverse incoming spin well, but only if the player wants this. For instance, a passive block will reverse incoming spin, but a passive block with slight forward movement will produce a dead ball. You will normally be unable to spot the difference. If your opponent doesn't know how to handle his LP, you can feed him/her spin and expect the reverse, but if he or she does know how to handle the LP, you will be better off to load up your loops, keep them on the table (hitting softly), and try to beat your opponent by making him/her move left to right and in and out. If balls bounce high you can attempt to kill them, but even then make sure you put decent topspin on.
The second kind of LP is the all-round one. Examples: Friendship 837, Globe 979, Dawei Saviga V, maybe Galaxy 955 and Neptune. Although these LP's will reverse heavy spin, they won't do so without help from the player (who has to use his wrist). You cannot rely on reversal. You will have to move your opponent around the court a lot and load up your soft loops even more.
The third kind is the chopper's LP. Examples: TSP Curl P1R, Butterfly Feint Long II and III, Juic Leggy, Dawei 388D, Hallmark Frustration. These LP's work like inverted rubbers whilst they are pretty much insensitive to incoming spin. If you are up to an opponent who knows how to use them, you can kiss your sorry ass goodbye, unless you are able to load up your loops as a professional can and even then you'll have to be smart and push or drop-shot regularly.
A much better way of dealing with the situation is to watch in the first game very closely what happens when you push or loop and then adjust your game accordingly.
Of course, if you are using short pips expertly, no LP-player stands a chance. But I don't figure you're using pips...
Wacking Wayne wrote:
Push to the Lp's, remember that those rubbers cannot put any spin on the ball,
Sorry Wayne, only LP's from the first category on no sponge might have this deficiency. And even they can be used to kill that pushed ball instantaniously if it is slightly long. If you suggest pushing balls just over the net, you're advising a defensive strategy against a defender. That will produce a long match, probably a boring one, and the real defender will of course win.