Depends on how much work you have done in the past on paint refinishing, and the standard you are trying to achieve.
The scratches on presumably a flatish part of a panel should be easy, but chips on the edges of a door will be harder.
Not much to it. There must be loads of YouTubes on it I'da thought.
Clean
Sand back using wet and dry, and soap to lubricate (NOT washing up liquid which contains salt)
Prime/fill/use primer filler depending on depth of scratches
Flat back again
Keep repeating till the scratches have gone
Ensure you have a good "feather edge" using finer and finer grades of wet 'n' dry
prime
reflat
spray
flat
spray
Repeat last bit as many times as necessary. You do not need to flat between the last few thin coats.
It's a while since I did any of this and products have changed a bit I should imagine. Recent work we have had done by a pro who comes to our house does it on the drive with water based products and leaves a fantastic finish. He doesn't do half what I would do but that is the difference between a pro refinisher and an amateur. He is also an ex-pupil of mine so he gives us a good price!
To be honest, if I was you and could afford it, I'd do just that, employ a mobile pant refinisher. But get quotes first as some of them are extortionate. Don't matter if it is accident damage being paid for by insurance but for a private job.....
Just noticed you are in Oz. If you are in the outback, disregard last comment obviously!
If you have a metallic, (doesn't sound like it) then get back to us as this is a bit trickier.
Others will disagree with the order of what I do and I may over do the number of times I prime/fill and flat back again. But then I am not a pro.
With chips on door edges you basically do the same thing but it much trickier to get a proper fill and it will tend to droop/ become uneven/fall away as you flat. You'll get fed up doing it.
The secret is to let stuff dry properly between levels of filler and be prepared for it to shrink. The faster you try to do it the more mistakes you'll make.
You also need to work in a dry and preferably not too cold environment. Not a problem in Oz. In fact the opposite may be true, a danger of products drying too fast. In which case I would say work in the shade and early in the a.m.
As for products, I'd a thought fillers and primers (white in your case) would all be much of a muchness, but the top coats need to be properly matched. My old neighbour used to do all this and he once showed me the book of paint chips just for "white". Thick as an old phone book, couldn't have imagined it. The paint code should be on a decal, often in the door shut but on your Disco is on the plate on the bonnet shut, with all the other info.
Best of luck.
