1. Any idea what the difference between what medical and food grade would be? I assumed food grade would be safe enough.
-- i believe it has different surface texture but then again, i'm not sure. it does sound safe enough.
2. the clone-a-willy set comes with a tube in which an erect penis is inserted....so you will not be able to make a mold of balls etc.
-- that's awesome, they didn't use to have that when i looked at them last year
3. Yeah, I was wondering how that would be done. I mean, I don't think you'd just paint it right on top, or use normal paint. But I've got artist friends whom wouldn't mind doing such work, once I figured out the process.
i believe the colors are usually air-brushed on but i don't know what kind of paint is used for that.
4. Well there are actually a few youtube videos about how to convert a packer into an stp, usually by burning a hole through the middle. But I had planed on just having the hole in there from the start by coating something long and slender(heh) with an anti-bonding agent and letting the silicone cure around it.
---that works well with cyberskin packers. silicone however won't burn the way cyberskin does (after all there are silicone muffin "tins" etc.) and when you just push a needle through the silicone, it will tear (i've tried, broke my Mr. Right that way). Your idea sounds fine to me, though i would coat the actual stp your're gonna use with the anti-bonding agent and put it in there.
Have fun!