010 piston fit.. to lap or not to lap?, that is the question

I received a new 010 piston from ebay today, and it wont fit the cylinder, barely makes it past the ports and gets stuck, the piston was put into a normal envelope, no protection... im thinking it went through the rollers at the post office.. distorting it, i have 2 engines, one basically new, and both pistons/cylinders interchange, i did a quick and dirty check by putting a bright white led into the cylinder too see if i can see any light emanating from the sides which would point to a distorted piston, i didnt see anything it looked ok.

So should i lap it..? or just chuck it in the spares bin, and run my original piston, that works fine, but is on its way out.. im thinking the latter.

Thanks gentlemen.