i came back the next morning to finish off the fiberglassing but the Blue PVA still feels a bit tacky but only on the clay wall the moisture must be effecting it, if it hasn't dried in 14 hours then it probably never will, the blue PVA has gone off on the life cast so it should be ok when it comes to releasing it. several coats of max wax and then a dusting of talcum powder to help absorb any moister it is time for the gel coat.
after an hour the gel coat has hardened on the life cast but not on the clay wall it is still a little tacky so i came back a bit later but it is still tacky so i decided to go ahead with the fiberglassing i think the clay is effecting the gel coat.
the fiber glass went off fine so i trimmed it back and cleaned off the clay ready for the silicone on the front. when i took the clay off the fiber glass was still sticky underneath so i left it for awhile to hopefully go off when there is no moisture on it. after searching on the effects lab forum i have found some useful info on the best way to seal clay walls, http://www.theeffectslab.com/forums/viewtopic.php?t=7511&highlight=cleaning
the next one is for polyurethane resin but is useful to know: www.theeffectslab.com/forums/viewtopic.php?t=7765
just leaving it seems to have done the job and is no longer sticky so i can move on to building the retaining wall and painting on the first layer of silicone.
then painted on a thixo layer
then the next day i trimmed the silicone edges to create a cleaner edge for the fiber glass jacket and once the fiber glass had hardened i trimmed the edge and drilled the bolt holes ready for cracking open the mould.
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