Mousey

Hi, Im new to this forum and I just wanted to ask questions about coin collecting. I have a lot of coins which are old, rare and fairly new from different countries and a lot of them are in good condition. Is there a best way to store them to keep them in good condition? Also, some of my coins are dirty, I'v heard about using malt vinegar and I tried using this on my oldest coin (stupidly) and it rusted. What is the best way to clean them? I have a coin that dates aaaall the way back to 1928 and it is a 6 pence. How can I find out if it is worth anyting? And last but not least, I have 2 coins which are silver and made out of metal but they extremely light. On one side there is an image of a tree with some sort of arabic writing on the top (or somrthing) and the dates at the bottom and on the other side, there are two leaf things around the edges, a '5' in the middle and more writing at the bottom. Does anyone know what it is? Thank you for your time

Just out of interest, What is the oldest coin anyone here has had? mine is from about 1928 and is a 6 pence piece.

wow, thats old lol. Did you buy them or find them?

Thanks for your help I'll be sure to check it out