I am currently building, in 1/72, the Airfix Chipmunk and Airfix FW 190. I have dealt with the seams and joins and have sprayed on a few coats of Vallejo primer, (thinned 80/20).
It has gone on lovely, nice and smooth with good coverage etc. However, my problems have now begun! I have found a few visible seams and the odd area where extra filler was needed etc. Having applied more filler and sanding back to smooth the primer has peeled/flaked off in small areas.
This is the first time that I have used Vallejo primer. I wanted a suitable primer that can be put through my airbrush with a simple clean up and not too smelly, as that bothers Mrs L! I had read various reviews and was aware that some have found that Vallejo can peel away so I lightly sanded the surface before application to give the paint a key etc.
I’m looking for some advice on a few issues, firstly the cause. Have I thinned it too much/not enough? Or when sanding back the primer have I used a too course grade and simple scratched it off?
Secondly what to do now, sand it all off of try or feather the edges? When I try to feather the edges it just seems to get bigger would it be easier to get a fine sander and take it all back to the plastic and start again.
Thanks in advance.
Leon