martin collins 1 Posted August 13, 2019 Share Posted August 13, 2019 How many of you sand off the laser burning of the wood before gluing together, i am using Aliphatic and PVA, some of the bits would be hard to sand the joint before assembling so was wondering whether you all bother? Quote Link to comment Share on other sites More sharing options...
Cuban8 Posted August 13, 2019 Share Posted August 13, 2019 On small parts or thinner sheet, I just wipe over the burnt surface with my thumb or finger to take off any loose excess and then glue as normal from there. I might wipe over with fine sand paper if the part is more substantial say 1/4 sheet. Experiments with scrap would suggest that even this is not really neccessary, makes me feel better to do it though. I don't use Aliphatic so can't comment on that adhesive, but no issues with cyano or PVA. Quote Link to comment Share on other sites More sharing options...
Broken Prop Posted August 13, 2019 Share Posted August 13, 2019 It is a good idea to sand off the surfaces that may end up under the covering, for instance the top and bottom of wing ribs and spars. The burnt surface of the wood can show through light coloured coverings. Quote Link to comment Share on other sites More sharing options...
John Bisset Posted August 13, 2019 Share Posted August 13, 2019 Does the bunt surface inhibit the uptake of any of our commonly used glues? Quote Link to comment Share on other sites More sharing options...
Jon H Posted August 13, 2019 Share Posted August 13, 2019 i just cyano it together and move on Quote Link to comment Share on other sites More sharing options...
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