I'm looking for unusual colours for resin crystal casting. Does anyone know where I can buy cool colours online? If not has anyone tried acrylic or oil paints and know which works?
ceiling tile is a pretty good sound insulator already, so this may be for nothing, i would try without first, but yes you can put insulation directly on the ceiling tile, but if you ever have to get back up there what a nightmare, itchy nightmare, not to mention your lungs.
It is physically IMPOSSIBLE to lock ANYTHING without a lock, PERIOD. In your case, a lock is the WORST possible option. If your relative can't be trusted not to turn the stove on, they shouldn't be left unattended and able to get NEAR the stove. Note: I would be surprised if it is possible to lock the CONTROLS on any stove. The DOOR to the oven is the only part I have ever seen a lock for, and it normally only locks during the self-cleaning cycle.