Thanks, for all your tips guys.
Adding acyrlic gel to the tracks and wheels to blur details might be the best option.
Water splashes are done fairly easy:
1.) Take a clear sheet fro vac-forming.
2.) Put part/kit upside down.
3.) Pull heated sheet over the kit/part and pull down to create a funnel type shape.
3.) Cut out, cut strips into the slash, heat the strip so that the curl and form globes(splashes).
Saw this done many years ago on a show called TV-Champion over here where they had one of their Pro-Modeller competitions featuring Takuji Yamada(J-Hulk might remember it), it was done for a figure running though a puddle but I think with a bit of trial and error I might be able to make it work for this.
The theme for the competition was "Water".
Sorry, don't have a pic of the original handy as I lost the mag (Hobby Japan) where it was also published.