The doors appear to me to be very rustic. What look are to trying to obtain in your house?

The good thing about existing doors is that they are hung and fitted to your openings. If you look up how to install new doors, it's no picnic. With the existing doors, all you really need here is a bit of sanding, or you could paint them as is if you want to stay with the rustic look. A satin or semi-gloss paint would make a feature of the uneven surface if you left it that way. You'd want to sand a bit after the first coat, I think, but just to smooth down the loose fibres.

Are you doing any work at all yourselves? If so, then I would suggest it might be worth your time to learn the skills and acquire the tools needed to do this job - it wouldn't be rocket science. You'd need a sander (by hand would be possible too), some dust masks, and maybe some sawhorses for setting up the workspace outside.

The wood is actually quite beautiful, and the tone quite warm and pleasant, not dark in a bad way. But in certain types of rooms I can see you'd want them lighter.

KarinL

Our house is a california Mission style ranch house built with Adobe bricks. The gorgeous example to think of is the house from the movie "It's complicated". Think warm white washed adobe bricks (you can see the texture), red tiles, terracotta floors, massive redwood mantle, exposed beams. We are remodeling to improve the functionality of the layout.

With the doors, there are too many and I know our time and skills will not allows us to take this on. I would love to find someone in SF bay area with the tools and show them an example project pics..

Karin1 --> The location of the doors are changing.. so they have to be re-hung afterall. I am not able to quite visualize the satin/ semi-gloss look..

I think the doors match the character of the house, don't think I would go with a hollow core door.

I would look at new door hardware to make the doors more distinctive, and possibly a new trim mouldings.

The only way to smooth them nicely would be to pass them thru a thickness sander. You'd still be stuck with the vee grooves and have a door that was at least 3/16 thinner, so it would change the way the door closed. But, you could then cover it over with a "door skin" (sheet of 3/16" plywood) to give a truly seamless face.
You know, they contain a fortune in clear redwood. The price of it has just skyrocketed in the last 10 years. I'd really leave them be, or sell them for the lumber.
Casey

OH please oh PLEASE keep those doors. I have hollow doors and they are the worst! They feel and look cheap and I doubt you could find a new door that fits the character of your home. It may be possible to sand it down to a smoother finish.

Sloyd's suggestion is also a good one.

Here is a link that might be useful: