1. M8 nuts don't fit properly onto the studs embedded in the legs. By hand selecting I got 4 nuts to go on, but it's no good like that it needs all 8 on. Could they be something other than M8? (It's a metric era mass produced table from the developing world). I'd do a stud thread refresh but the tpi doesn't quite match M8 so it would trash them.
2. A kid has drawn with a pink felt tipped pen on the top in one corner, an d I've had no luck getting it off. Failed: detergents, paraffin. Barkeepers friend makes a little progress with huge amounts of runbbing, but not enou gh to be practical.