I prime using Mr Surfacer 1500.Is it ok to airbrush the base coat with Mr Color lacquer paint then.Use Vallejo Model Color.

The rule always used to be that you can use solvent based materials over acrylics, but not the other way around. That said, today's finishes are more complex and can sometimes be used the other way. I would try it on a sample piece first to see if it's ok. Regardless, make sure the lacquers have dried for a very long time-like close to a week- before going over them.

Great thanks my plan was to use Acrylic over Lacquer

Why would you even want to do that...there are acrylic primers every bit as good as lacquer...and it would save you a lot of unnecessary grief.

I haven’t found a good acrylic primer that compares to Mr Surfacer 1500.Tried Vallejo and wasn’t impressed.

Give Tamiya rattle can primer a try. I use that on every model I build, whether AFV or figure, & it hasn't failed me yet.

Agreed...Tamiya 'Fine White' is a very good primer...but expensive!...and add Games Workshop to the list.

Concur - Tamiya grey primer is my weapon of choice, but definitely not cheap. Never tried Games Workshop primer personally, but I’ve heard good reports about it. Halfords auto primer goes on well too, & is quite competitively priced too.

Tried Halfords...but found it clogged detail unless used sparingly.

I use Halfords primer as well and have never had a problem of clogged detail, and as Steve says not too close and short light coats and as with the normal modelling practice 3-4 thin coats are better than 1 thick one.

Pic shows Grey and White primer sprayed.



Cheers
Geoff

Mr surfacer is as good as Tamiya. I use Tamiya and never had any problems.
I wait 24 hours after priming and do abrade the primed surface before painting with acrylic using grey 3M pads. I use maroon pads before priming to improve adhesion of the primer as well.