Plastic Standoffs for Arduino Mega 2560 on Prusa i3 Aluminum Frame?

I purchased an Arduino Mounting Kit with Female-Female Standoffs from Vetco (VUPN7117) They fit just fine in the Arduino Mega (after a bit of a run in with the dermal tool). Maybe this sounds dumb, but the screws are metal and the standoffs are plastic, as long as the screws don't touch any electronic components on the board, and the other screw attached to the plastic is attached to the aluminum frame, I shouldn't have to worry about any sort shorting out correct?

I saw something mentioned in the wiki about using Arduino washers (whatever they are) to keep the current from flowing into the standoffs, but I'm also assuming they are talking about metal standoffs.

Arduino washers are nylon. If u in USA go to Home depot and get nylon screws, washers, and nuts.
The Arduino washers keep the board off the metal frame Prusas.
Standoff vias on boards are covered or not. If not they are usually used for grounding purposes. If shelaced then they are insulated.

I actually screwed in little bits of plastic in the standoff between the screw that's attached to the frame and the screw that attached to the board. I hope this does the trick.

What does shelaced mean?

Shellacqued is the correct spelling. A glaze coating that is hard like a varnish.

I designed and printed these for mounting the Aduino/RAMPS on my printer's 1.5" square T-slot frame a couple years ago:

[www.thingiverse.com] and then this: [www.thingiverse.com]

No screws needed- it just snaps in place. It shouldn't be too hard to modify to fit any other size T-slot extrusion.

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Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]

since you have a 3d printer you could just print something out.
The best thing to do is make some pla or asb washers.
So it would be screw head, washer, frame, standoff , board ,washer, nut.