Had a go with the Vallejo vinyl filler and sprayed those areas with Mr Surfacer 1000. Mixed results. Filling a gap then using wet fingers or cotton buds get the best results. Never use it for seams where there is a small step but no gap.
Filled with Green Stuff, filed and sanded down, then sprayed with Mr Surfacer 1000. Made a lot of file marks and my Mr Surfacer 500 is one blob of goop. Need some more.
scale modeling database | stash manager
