Ok, this isn't a custom, but I was trying to get MP Starscream's fingers to stop being so loose, and what I used was this glue called "Tamiya EXTRA THIN Cement". Now, what I found was, that instead of just becoming a new layer to make it firmer, what it did was MELT THE PLASTIC!
I think that was the idea, being it a modeling glue, that the two pieces being glued would melt together so that they would stick together. Now, one of the thumbs keeps falling out, and the plastic has turned a bit white. What glue should I use, what could I do about the thumb falling out??

 

I've found Krazy Glue to be the best for adding layers and tightening up joints. Works as good as clear nail polish, but more permanent.

 

I've found the opposite of Krazy Glue... it's tough, but doesn't want to stick to the plastic at all once it dries.

Probably depends on the plastic, so your mileage may vary.

zmog

 

I'm also wondering what I could do to fix the "ball joint bed" (whatever you call it, the "connection point" or whatever), because the glue melted the sides of it a bit, and thats why the thumb falls out

 

do you think sculpting putty will help with the melted socket?

 

also, would there be ANY remote chance of being able to replace the "palm" of the hand?

 

just coat it with either future floor finish, or with clear nail polish.

only way you can replace the palm is to get another starscream, or pay someone to cast the part for you.

 

How much would it be on average to cast another part?

 

holy hell, that sucks more than a pacifier

 

I don't know, I've personally never made a mold for anything. If I were you, I'd mix a really tiny amount of apoxie sculpt, push it down into that melted socket, then dip the ball of the thumb in water, then push it down into the putty, so that it forms the proper shape and size. Then pull it back out and let it sit a day. After that, check to see if its loose or not, and if its still a little loose, then coat the sucker with future or with nail polish to tighten it back up.

 

You could also try aquarium sealant.
It will dry, remain clear, allow some movement and can be removable if you need to redo the job in the future.
Or just battle damage the thing...that's what I'd do... 

<NO THUMB !

 

Holy hell, I don't want my figure ending up like yours!!!!!!!!! Lol, I just want to be able to pose him without having to put his thumb back in.
Anyway, I used some "Nail Protector" on all of his joints, and they seem to be a bit less loose. The thumb can stay in, but its still removable. So I'll try what you were talking about REDLINE, and see if that works. NOTE, the thumb ball also got a bit melted, so it's not a perfect ball.

 

Coat n sand until it's a ball again? o.o