The very first figures back in the 40's were all metal. I still have some of them.
I ran it on vinyl and had no issues....all you can do is try it for yourself, but I don't think it will scratch. I tried a milk jug first, but didn't get good results. I'll have to play around in the recycling to see if any of the bottles are made from First Run Proline plastic! Have fun with it...think outside the box...be creative...you never know how long the base manufacturers will be in business, bu I am sure we will never run out of Coke cans and shells without prongs...

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EM-F-er [ěm -f-er] –
noun-abr-slang: Electric Miniature Footballer
1. a person/hobbyist/gamer who creates a representation of American Football in a small or reduced scale for competition or show.
2. the majority of forum users on the website,
www.miniaturefootball.org
—Idiom
3.
One Bad Em-F-er, negative shout out; pertaining to weirdwolf:
There goes one bad EM-F-er. I mean he can’t play and ain’t never win nothin’!