No one's saying we didn't send artefacts to the moon ...

{Actually, done prior probably say the moon doesn't even exist, but I think this makes the point - there's a plausible reason for a reflector being there that doesn't require a manned moon-landing.

Just saying that for the sake of argument.

Though I did see a program as a teenager that presented some convincing 'evidence' that NASA/USA Government were lying to the public. Then it comes down to whether you trust the USAG who you know have lied access manipulated public perceptions on a grand scale, or trust random program makers who you don't yet know to be liars.}

In those cases I usually change tactics and steelman believing the moon doesn’t exist (it’s just projected to the sky) ;)

Then you can see if they have the reasoning skills to convince themselves the moon isn’t a projection.

Surely that can be easily waved away in the minds of an ignorant by saying it's just a shiny rock, crashed satellite, ice patch or some other silly nonsense.

Explain to them how the bright traffic signs work. If they were just mirrors, they would be invisible at night.