Bad plastering - can this be saved?

Hi all,

I recently removed wallpaper from my living room walls and there was a layer of paint that came off in some areas and not others. There was also quite a lot of plaster which came off too. So some areas of the wall had bare plasterboard, some parts had plaster covering the plasterboard and other parts had paint overy both plasterboard and plaster. Hopefully that makes sense.
Anyway, I wanted to paint the room so I thought I'd try and smooth out the different layers with some plaster of my own. Naturally I've messed it up so I'm just wondering if I could get some advice as to what my options are.

I've attached a photo of some of the worst parts. I've tried sanding a little which did make a bit of a difference.

As far as I can tell my options are:
1. Keep sanding everything down so it's level.
2. Try and repair these marks with more plaster (given how bad my first job was, I don't think this is an option).
3. Lining paper over this and paint over the lining paper.
4. Paint several coats of Base coat and paint in the hope that it will fill in the gaps.
5. Sell all of my possessions to pay for a professional to fix it.

I'm generally not too bad a diy stuff (some of you might not believe that but it's true) but this time I just rushed it and didn't quite realise how difficult the job was.

Any help would be much appreciated and please try to keep the laughter and scolding to a minimum!

In the 70's wood chip was seen as a wonder substance, but I'd never recommend (ever, ever, ever) that product.

Choice

Get room skimmed by a plasterer or as an alternative line all walls with a thermal product (they tend to be 2mm + thickness). Can't see scale on the posted picture, but 2000 type lining paper (the heaviest) doesn't look as it it would suitable.

Problem with thermal paper is cost (7.5m sq is >£35 a roll), add to installation time and £200 ~ for re-skim might be more viable.

Option 5 but depends on where you are in the country- gotta be skimmed

OK doke, thanks very much for your help.

Thick lining paper is the easiest option.

I feel your pain- I've done terrible things with plaster and a belt sander in the past. It got the job done but it was incredibly messy and noisy and not really the way forward. Find yourself a tame plasterer and step back and marvel while he/she makes it look soooooooo easy!