Dek, Hi,
As someone who spends too much time plastic modelling at the expense of ME can I assure you that the Acrylic tube paint is not the path to take for spraying your model. As has already been said the pigment is far to coarse for it to be thinned to the viscosity required for an airbrush.
There is an absoute myriad of (acrylic) paints out there to bewilder anyone new to the hobby – Humbrol, Hannants, Revell, Tamiya, Gunze Sanyo, Mr Paint, MRP, Vallejo, AK interactive, Mig Ammo, Hataka etc etc There are two kinds of acrylic too – Polyurethane based and Lacquer based. Either work fine but it's best to stick to one or the other when spraying a model – for the first time
As with anything, all who participate in this great hobby will advocate one paint over another – another myriad of choice. Personally I would not say one is vastly better than another though I do have my preferences – like most it's down to individual choice. That said, given this is your first attempt I would suggest you consider using Tamiya Acrylic paint and Tamiya thinner for the spraying. It's readily available in the colours you will require, sprays exceptionally easy and dries quickly. Lacquer based, unfortunately it does not brush paint that well but is okay for very tiny parts – the Vallejo or similar paints are ideal for this.
What I would strongly recommend however is that you practice on something before spraying the model itself.
Priming is important – I prefer a lacquer primer to the Acrylic ones mainly do to drying times – Tamiya do an excellent one in an aerosol – another is Alclad 2 'Fine Grey Primer and Micro Filler'.
I'm afraid what you have discovered is that plastic modelling is not such a 'cheap' hobby as many think – buying the kit is the first stage – what and how far you go with it after that is very much how much extra one is prepared to pay. 'Drip fed' it can drain a wallet very quickly indeed !
Good Luck with your model whatever you choose
Regards – Tug
Edited By Ramon Wilson on 24/02/2020 12:19:50