Ceramic coating - is it worth?

[A6S]

I forgot to add, when doing it I noticed some of the paint felt rough. 2 weeks ago, the local Audi garage repaired my rear bumper which was damaged in transit.
It feels like a lot of either spray or lacquer dust has settled on the paint. I paid them a visit today and they are going to mop my car. Ah well, that's all the work wasted but at least I should get a great base to start again LOL.

I would be a bit worried letting the dealer mop the car as a lot of them aren't gentle on the paintwork. Some cars I've seen in dealers forecourt have very bad marring marks clearly from a mop and an inexperienced valet. You don't want them to leave the paint too thin.
If it's some crap stuck to paint then a good clay should remove it.

[Tripletrouble]

I have a clay bar here, I may well try a little sample tomorrow, good idea I hadn't thought of that.

[A6S]

I have a clay bar here, I may well try a little sample tomorrow, good idea I hadn't thought of that.

Just remember to Get it well lubed up and you won't scratch the paint.

[Tripletrouble]

With something like a detailing spray or washing up liquid and water?

[A6S]

Use a detailing spray. Washing up liquid works if you are ready to polish/seal/wax afterwards as it will strip all forms of protection from the paint.

[Gazwould]

WASHING UP LIQUID .

NOOOOOOOOOOooooooooooooooo .

[pxr5]

Detailing spray or strong shampoo mix. Or - Use Bilt Hamber clay, which only uses water. Another option is a clay mit, much quicker and safer than a piece of clay. Halfords sell the G3 one - 'tis very good.

[Tripletrouble]

Use a detailing spray. Washing up liquid works if you are ready to polish/seal/wax afterwards as it will strip all forms of protection from the paint.

I'm quite happy to do that to be honest.

[A6S]

I'm quite happy to do that to be honest.

If you are just testing if the overspray/crap will come out then use a detailing spray cause if it doesn't then it's the dealers problem.

[artheb]

I finally decided to use a "standard method". I washed the car and used following:

1. Bilt Hamber Auto Clay Soft
2. Auto Glym Super Resin Polish, 1 Litre
3. Collinite 845 Insulator Wax, 473 ml

Very happy with the results. It is very shiny and water beads off car quickly. I must say it was good fun to do all of that. I finally had a chance to use a wax applicator machine which I bought in Aldi or Lidl 10 years ago!

Question: how often should I apply wax?

Thanks for all the tips.