How to join balsa sheets to avoid unsightly seams and bulges ? give this a try when you next need to make two 4 inch sheets into one that is 8 inches wide- Firstly lay the two pieces side by side and check which is the two best edges,if non are suitable overlay the two sheets slightly and pin at three points,take your metal straight edge ( did you follow the other tip and get hold of some industrial hacksaws ? ) and gently cut the two pieces together,next run a strip of masking tape straight down the joint from top to bottom,now fold the two sheets back to back,mix up some thinned PVA adhesive and apply down the joint with a small paintbrush,now close the joint and carefully run a damp cloth along to remove surplus adhesive,out with the masking tape again and this time run another strip down the other side,place the wood between plastic sheet ( save your Solarfilm/Solartex backing for this ) and place books along the join,leave overnight and in the morning remove plastic sheet, and masking tape,result some nice wide timber to work with and this will save you having to make a special and expensive order for wide balsa stock.
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