If he's like my dad? He will just get loud and say something like. " It's mine and I've used it on everything for 200000 years! I'm not putting canoe wax on it!" While his hearing aid is screeching from across the room, and he can't hear the high pitch noise. Or he would dig out the rusty tin can of turtle wax that is all dried out and was probably left over from my grandfathers garage. or..30 year old armorall! And has already soaked half of the machine down with WD40 or Kerosene and a brush. Also touching everything up with 20 or 30 year(or more) old cans of spray paint swearing because it's still a full can and it won't spray, so pounds a nail in the can to dump the paint in a baby food jar after dumping the used straightened rusty nails out of it, and the 20 rolls of tape that he still saves, and when you go to peel it? It comes off in torn shreds because the glue is so dried out, he swears because it won't stick. Has some hardware store name that hasn't been around for years etc...
Probably making his own rubber bumpers out of an old dry rotted bicycle inner tube, or something similar...Maybe even moms old panty hose stretched tight, while explaining the time they had to use it as a fan belt, for the millionth time, and that it actually works in a emergency.
Sry, was just thinking what would happen if my dad was working on a pinball! lol I love my dad, but it does get comical! That's going to be me one day! Ohhh, and when he was done? You could actually play the thing! It might not be perfect, but it would work!