Yes you can, but it is a cleaner job if you remove the old caulking (as much as you can) and reseal it with new caulk.
Not the greatest idea, when packing in the oakum and then pouring the lead and caulking it the hub could split wide open Your new caulking job will last longer if you remove the old caulk and any of its debris and make sure the area is dry before adding new caulk. You can use an old screwdriver to remove the old.
I own a caulking company, we caulk over 200 pools a season in the mid atlantic. The caulking we use is a two part poly urathane caulk. You can use a one part polyurathane caulk as well it's just not as good. This joint is an expansion joint that seperates the coping from the deck (concrete, pavers, etc). When you use sertain caulking material in conjunction with their speciefied primer they are considered submersible.
Caulking can be done either before or after painting depending on how steady a hand you have. Be sure to use a "Painter's" caulk, which is latex based. Silicone based chalks can NOT be painted over.
Polyseamseal silicone caulk would be the best caulking to use with bathroom tile, if you're not going to pain the caulk. If you desire to paint the caulk, MAPEI latex caulk would be best to use with the bathroom tile.
pull it out
Caulking can be an answer but when you do it you have to be very careful. Try to not destroy something else while you are doing caulking. If you are unsure of doing it look at yellow pages and call someone who is professional.
I have no idea but it disitagrated my bathtub caulking.
NO, worst thing you can do ! -strip ALL old caulk off and clean edges with lacquer thinner or acetone before re-caulking.
DuPont Painters Caulk allows you to brush paint in only 30 minutes after applying the caulk.
Usually above freezing, and keep the caulking from freezing also.
Hardware store-comes in a tube for use with a caulking gun.
Any hardware store. Just get 100% silicone caulking. 100% silicone caulk will not take paint, but it does have an excellant lifespan.