Can i reuse these Wiseco pistons?

[Garage Skidz]

I bought a 240 for cheap with a built sr20 but previous owner said it had a bad bottom end noise. So as i disassembled the engine i found that it ran without the oil pump drive gear attached, so no oil at all (however the engine only idled for 5 or so minutes). 3 of the rods were fine so i figure i can reuse them without a problem. Three of pistons are not worn too bad and was wondering if i could reuse them or not. i got one new 87mm piston and measured the skirts with a caliper and they are close but slightly worn down from the lack of oil. they are supposed to be 87mm at the base of the skirt as i measured with the new one but they are 86.95mm on the other 3.

this is a budget build so i would like to replace the least that i have to and pistons are expensive.

So my question is, will .05mm be a big difference? Will that cause piston slap or will i be ok? Can i just lightly sand these smooth and be ok? Has anyone done this and it work?

new vs #2 piston

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