I have tried to powder paint fg12 on my football jigs (straws, metal tubes, alum. foil).  Nothing was satisfactory so I decided to make some plugs.  I tried every size nail and wire that I have in the shop.  All were too large or too small.  My wife came out to the shop and commented on the pile around the mold.

When I explained what I was doing, she said why not cut a toothpick in half and use it.  My thought was ok this thing is going to burn and I'll have to drill them out.  As it turns out she had a great idea.  Every piece of tooth pick came out and when they wear out replacement plugs will be very cheap.

see we learn something new every day

cant beat a toothpick.  A drill bit works good too.  Thats usually what I use when I make shakey heads.  I think its a #48 that fits in a medium hitch hiker.  then I put the whole thing in the place of the pin.  Your FG12 will probably be a different size bit.