As an after thought, i have had many customs with glueing and cutting, and paints with chemicals in them, and i'm not dead yet,
so... thats my view 
And, we all want to be sure that you
stay alive,
Conor !!!
And, none of us would ever want you to be injured !!!
We would all be very upset,
Conor, if any of us suggested something that you tried which resulted in your seriously hurting yourself. It's you and your sister that we want to protect !!!
So, don't tell us that you play with glue, chemicals and sharp objects to try to make us feel comfortable. When you're here at Playmofriends, most of us feel a bit responsible for your well being.
Neither
Andi's recipe for restoring white Playmobil that had yellowed nor
Bill's customizing techniques will be posted here for you and
Aine to see. Why? Because we care about you both !!!
And, what does that mean? It means that the older Playmofriends will either email or send private messages to each other, as we currently have no place to post this kind of information. No place that makes us feel comfortable.
Conor, if you don't know now why we feel responsible for you and your sister, I can only repeat what you've probably already heard too many times, "Someday, this will all make sense to you." ...

All the best,
Richard