Don't think that it was the base that was the trouble, as it seemed to stick down fine when I could get the pva to penetrate, and getting towards the end, think that I was trying to hurry and put too much down at once.
Started by just using papermache (mix of pva/water/tissue), allowed to dry completely so was solid, but have now cut that out, and replaced with corrugated cardboard + layer of pva/tissue and the texture pressed in while everything is wet. Stuck fine in the corners - where I could get a thick coat of pva mix, so I'm thinking it was lack of penetration, rather than anything else.
Of course, could easily be the material that I'm using for the road, which is coffee grounds only as they're of a slightly differing mix of size which gives an interesting texture - closer than sand, which tends to be of fairly uniform size grains (dried - wondering if it'd 'take' the glue better if it were wet?).
Started by just using papermache (mix of pva/water/tissue), allowed to dry completely so was solid, but have now cut that out, and replaced with corrugated cardboard + layer of pva/tissue and the texture pressed in while everything is wet. Stuck fine in the corners - where I could get a thick coat of pva mix, so I'm thinking it was lack of penetration, rather than anything else.
Of course, could easily be the material that I'm using for the road, which is coffee grounds only as they're of a slightly differing mix of size which gives an interesting texture - closer than sand, which tends to be of fairly uniform size grains (dried - wondering if it'd 'take' the glue better if it were wet?).
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