ChuckT Posted January 2, 2020 Share Posted January 2, 2020 Hi there everyone. I'm wanting to sand some balsa and overlay it with either resin or cyano to give me a hard surface to scribe and rivet into after sanding smooth. Has anyone out there done this and which material would you choose to coat the raw balsa, resin or cyano glue? Thanks in advance and happy new year, Chuck. Link to comment Share on other sites More sharing options...
LSP_Kevin Posted January 2, 2020 Share Posted January 2, 2020 I haven't done it personally, but I know from the early days of Airfix magazine that coating balsa in CA or CA mixed with talcum powder has been a common practise for as long as both materials have co-existed. Kev Out2gtcha 1 Link to comment Share on other sites More sharing options...
Out2gtcha Posted January 2, 2020 Share Posted January 2, 2020 Agree with K1. Its been a practice in R/C aircraft building for a long, long time. Just remember that with Balsa, if you mix the CA with micro-balloons or talc, the reaction of curing happens exponentially faster as the CA gets thinner. Link to comment Share on other sites More sharing options...
ChuckT Posted January 2, 2020 Author Share Posted January 2, 2020 I was thinking of using baking soda with the CA. Any thoughts on this? Thanks again. Out2gtcha 1 Link to comment Share on other sites More sharing options...
Out2gtcha Posted January 2, 2020 Share Posted January 2, 2020 Never tried it myself, but I'd try it out on a test piece of balsa first though. Again, if it's a powder like texture, the cure reaction can be instant if you use thin CA. I'd recommend some extensive testing Jack 1 Link to comment Share on other sites More sharing options...
Jack Posted January 2, 2020 Share Posted January 2, 2020 why don't you use the underlaying balsa "mould" to heat-smash polistyrene plating over it, and doing that in relative smal parts, over the top and bottom of the balsa and glueing those parts, when adjusted, to the balsa core? Then scribing and such would be no problem. Lots of years ago i made a 1/32 Grumman Mohawk that way, but it was a mish-mash of different techniques, e.g. the wings were leftovers from other kits, even 1/48 scale parts, and build up to 1/32 dimensions. Link to comment Share on other sites More sharing options...
Jack Posted January 2, 2020 Share Posted January 2, 2020 34 minutes ago, ChuckT said: I was thinking of using baking soda with the CA. Any thoughts on this? Thanks again. baking soda and CA is usually applied to "cracks" in plastic parts, as you know it cures very rapidly, but i've never imagined it could be used on larger surfaces. Link to comment Share on other sites More sharing options...
ChuckT Posted January 3, 2020 Author Share Posted January 3, 2020 Thanks for the input guys. I think I’ll do some test runs and get back to you with the results. Please stand by. LSP_Kevin and Out2gtcha 2 Link to comment Share on other sites More sharing options...
wunwinglow Posted January 12, 2020 Share Posted January 12, 2020 On 1/2/2020 at 9:40 PM, LSP_Kevin said: I haven't done it personally, but I know from the early days of Airfix magazine that coating balsa in CA or CA mixed with talcum powder has been a common practise for as long as both materials have co-existed. Kev CA?! You were lucky..... Nitrate dope and talc in my day! Link to comment Share on other sites More sharing options...
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