Decks, Patios, Porches and Docks - Painting Deck/Door/Door Trim

OK, I need to paint the side garage door (The one you walk through, not drive through) and the wood trim around it, as well as the deck.

Regarding the garage door/trim:
Currently a solid colour (White).
Is it best to remove the door/locks prior to painting?
How hard is it to remove typical locks (Deadbolt) and put them back in?
What grit of sandpaper do I use to sand the door? The door trim?
Do I need primer? If so, what kind?
What kind of paint do I use?
How many coats of primer (if needed) and paint?
How long to let dry in between coats?

Regarding the deck:
Currently a solid colour - told it is a stain.
What grit do I use to sand?
Do I need primter? If so, what kind?
What kind of paint (It'll have to be a solid colour one) do I use?
How many coats of primer (if needed) and paint?
How long to let dry?

Anything else I should know before I tackle this?

Yes, remove the doorknob and dead bolt before you paint the door. HOW you remove them depends on who the mfgr. is. Might be as easy as 2 screws on the inside that are holding the 2 halves together. Some, like Schlage, have a little lock in a slot of the inside of the door knob. Depress the lock, pull the inside knob off, then the trim ring, and THEN you'll have 2 screws to remove.

What kind of door? A metal door will need little if any sanding, depending on how good the condition of the present paint is. Possible a lite sanding with a 220 or 320 grit paper in the bad spots. Wood will probably take a little more sanding, especially in the bad spots.

Primer probably isn't needed, UNLESS you sand down to bare metal or bare wood. If you do need primer -- just one coat -- that's all.

Exterior latex. One coat is usually all that's needed, but if you need a second coat, follow the directions on the can.

Drying time is also on the can. But if the door has weatherstripping, I would either remove the weatherstripping for a week, or simply not close the door for that long.

So does this look good for my door/door trim:

1) Take door off hinges
2) Take off lock/door knob
3) Sand down door (It's wood) - 150 grit?
4) Sand down door frame/trim - 150 grit?
5) Blow dust off of door/trim (What can I use besides a compressor to do this? Or just leave it alone? Or?)
6) Put a coat of primer (Any special kind I need - possible something that seals really good?) on door/trim/frame
7) Let dry
8) Paint door/trim with Latex
9) Wait to dry, then rehang door

Does that look good?

I would probably mask the hinges rather than remove them. (Use the blue painter's masking tape -- get it at any paint store or a hardware store with a decent paint dept.)

Use a tack cloth to remove the dust -- same source as the blue tape. You don't want to blow the paint dust around -- you don't what's in it!

Otherwise, you've got a good plan.

And I should be using a Latex paint instead of oil based?

That's what I would use.