Get some "OOO" steelwool, mix 1/2 linseed oiol and 1/2 minieral spirits and have at it... If that doesn't get the stains out then, bad news... They are too deep into the grain of the wood and the only way you'll get them out is to sand them out whioch I don't advise because you'll ened up havin' to refinish the entire table top... I think the steelwool and the linseed oil/ mineral sprits will work...

b~