Thanks for the replies.
pokey9000, yep at the time I was setting bed temp to 80C (approx 70C Glass surface temp) for the first layer, then knocking it down to 60'ish (~50C surface). It was the temp I first had success in getting the rubbish PLA to initially stick, so I stayed with it. I also experimented with about every temp possible with it, eventually I was using 1st layer bed/hotend temps that were more appropriate for ABS (Don't know what they used to pack the PLA out, there was some PLA in there, could smell it). Warping and not sticking were worse when using normal PLA temps (180-200C, 50-60C)
Nicholas thanks for ingredient tip, most of the UK extra strong hairspray contains,
Octylacrylamide/Acrylates/Butylaminoethyl Methacrylate Copolymer,
not sure if it will do the job (mine doesn't have it) , I'll experiment (I found a US gov health dept website that lists hairsprays that contain the chemical you named, 1 or 2 of the brands are sold here, I'll check if they still contain the ingredient or not)
Update.
That filament I was using would just not stick well enough to anything at any temp, PVA,Kapton,Lemon Juice,Clean Glass,Blue Tape (cold) etc etc without lifting/warping.
Yesterday morning I was having another go with PVA (same result would stick, then start to lift/warp 4-6 layers in) when my KDI filament turned up, so I swapped filament, everything else kept the same (I set hotend temp back to 180 for the new filament), the KDI stuck and stayed stuck, no lift no warp, perfect (well almost its a bugger to get off PVA lol). So the original PLA as gone back, its utter junk.
Right then, back to finishing the 3DR parts, cheers for the help guys.
pokey9000, yep at the time I was setting bed temp to 80C (approx 70C Glass surface temp) for the first layer, then knocking it down to 60'ish (~50C surface). It was the temp I first had success in getting the rubbish PLA to initially stick, so I stayed with it. I also experimented with about every temp possible with it, eventually I was using 1st layer bed/hotend temps that were more appropriate for ABS (Don't know what they used to pack the PLA out, there was some PLA in there, could smell it). Warping and not sticking were worse when using normal PLA temps (180-200C, 50-60C)
Nicholas thanks for ingredient tip, most of the UK extra strong hairspray contains,
Octylacrylamide/Acrylates/Butylaminoethyl Methacrylate Copolymer,
not sure if it will do the job (mine doesn't have it) , I'll experiment (I found a US gov health dept website that lists hairsprays that contain the chemical you named, 1 or 2 of the brands are sold here, I'll check if they still contain the ingredient or not)
Update.
That filament I was using would just not stick well enough to anything at any temp, PVA,Kapton,Lemon Juice,Clean Glass,Blue Tape (cold) etc etc without lifting/warping.
Yesterday morning I was having another go with PVA (same result would stick, then start to lift/warp 4-6 layers in) when my KDI filament turned up, so I swapped filament, everything else kept the same (I set hotend temp back to 180 for the new filament), the KDI stuck and stayed stuck, no lift no warp, perfect (well almost its a bugger to get off PVA lol). So the original PLA as gone back, its utter junk.
Right then, back to finishing the 3DR parts, cheers for the help guys.