Yes you can still spend dirty and damaged coins, they are still money.
Same with notes, even if you set fire to a note but the serial number is still showing you could actually spend it.
Edit: No don't use coinstar it charges you, just take them to your bank and change them for free.
Yes
why not run them under water it couldn't hurt
also remember you can also use coinstar to get cash voucher for them [or gift card]
Of course you can, its not illegal, as long as the store/other can see that its a penny
I have some dirty and some chipped penny's can you still spend them?? Like some you cant even tell its a penny can a store refuse them?