Uncle Pete Posted August 19, 2018 Share Posted August 19, 2018 Here's a curious one. Has anybody had this happen? I got the primer and first coat of sliver on my Lightning... So far, so good. But the next day I was faced with this.... I looks like somebody stubbed out a couple of Woodbines on it. I have no idea what happened. Regular Tamiya Extra-Thin glue and Humbrol enamels brushed on, no unusual heat conditions in the workshop while it dried overnight, no solvents laying around for spillage. (And, just for comparison, the metric ton of Evo Stik holding the lead in the nose didn't affect anything). I'm really scratching my head over this... Anybody got any ideas? Does this happen often? Does it ever happen at all?! Have I been infested by a new species of plastic gremlin? 1 1 Link to comment Share on other sites More sharing options...
bzn20 Posted August 19, 2018 Share Posted August 19, 2018 Might be a flaw in the plastic ,air pockets or something like a wrong plastic mix . Weird ,not seen that before. Link to comment Share on other sites More sharing options...
Uncle Pete Posted August 19, 2018 Author Share Posted August 19, 2018 16 minutes ago, bzn20 said: Weird You can say that again! Link to comment Share on other sites More sharing options...
bzn20 Posted August 19, 2018 Share Posted August 19, 2018 Could be your Lightning reactions 2 Link to comment Share on other sites More sharing options...
hacker Posted August 19, 2018 Share Posted August 19, 2018 For me it would be the wife busting into flames over something. Ok l am leaving now Hacker 1 Link to comment Share on other sites More sharing options...
lasermonkey Posted August 19, 2018 Share Posted August 19, 2018 Trying to think of a scenario that might explain what happened and a possibility is that if the paint was applied before the extra thin cement had boiled off completely, the volatile vapours may have been trapped under the paint. With nowhere else to go, it could possibly continue dissolving the plastic. I have noticed that the Tamiya Extra Thin doesn't boil off as quickly as MEK, for instance. It's just a guess really, but it's hard to think of anything else that might explain it. Cheers, Mark. 1 1 Link to comment Share on other sites More sharing options...
bzn20 Posted August 19, 2018 Share Posted August 19, 2018 47 minutes ago, lasermonkey said: Mark You use MEK ? Link to comment Share on other sites More sharing options...
Stu_davros Posted August 19, 2018 Share Posted August 19, 2018 I believe it was the Evo stick, I think it contains toluene. i had exactly the same issue with a 48th E2C having used evo stick to mount the nose weight. It’s still on the shelf of doom. Stuart 1 1 Link to comment Share on other sites More sharing options...
bzn20 Posted August 19, 2018 Share Posted August 19, 2018 (edited) 1 hour ago, Stu_davros said: Evo stick Yeah ,sounds good …******* Toluene although I remember an Acetone smell , not used it for years …. The transporter (Toluene/Acetone/whatever) in the glue has run down the bottom of the fuse . vapours would do it ,doesn't need to be the liquid Edited August 19, 2018 by bzn20 1 Link to comment Share on other sites More sharing options...
Mike Posted August 19, 2018 Share Posted August 19, 2018 I'd agree that it was something in the Evo Stick that has reacted. I remember a similar softening of the plastic in a kit I made years ago after putting too much glue in. It went all soft and like leather - stayed that way for ages too. You can find the data sheet for it here, and there's Acetone and Xylene in it, so it'll melt plastic, given the right quantities. Some probably dribbled downhill into the fuel pack and settled there. 1 1 Link to comment Share on other sites More sharing options...
Nigel Heath Posted August 19, 2018 Share Posted August 19, 2018 I have had something a bit similar to this happen on my vacformed Dalek, I used some tube glue and the plastic absorbed the solvent in the glue and became soft and leathery like Mike describes and it took many weeks for the plastic the re-harden. So basically some sort of solvent from somewhere has got into the plastic and plasticised it. (It does seam odd / puzzling where this could have come from). Once it does harden the defects should be treatable with filler (probably Milliput) and repaint from there. 1 Link to comment Share on other sites More sharing options...
Uncle Pete Posted August 19, 2018 Author Share Posted August 19, 2018 4 hours ago, bzn20 said: Could be your Lightning reactions Shaddap! 😛 1 Link to comment Share on other sites More sharing options...
Uncle Pete Posted August 19, 2018 Author Share Posted August 19, 2018 3 hours ago, Stu_davros said: Evo stick 1 hour ago, bzn20 said: Toluene 1 hour ago, Mike said: Evo Stick That seems to be the consensus. I'd ruled it out because the nose itself is OK and a couple of inches away from the damage. I see what you mean about the vapours, though, they wouldn't be choosy where they went. I think future nose weights will have to be applied with epoxy. I only dumped the Evo Stik on heavily because I'd forgotten to put the weight in and had to drill a hole in the nose and shove little splinters of lead through it, chasing them with gobs of glue so they wouldn't wander. 4 hours ago, lasermonkey said: paint was applied before the extra thin cement had boiled off completely That seems reasonable but I believe it was several hours between glue and paint. 27 minutes ago, Nigel Heath said: the defects should be treatable with filler I gave it the Miliput immediately. Lots of sanding involved so the panel lines on the underside are history. I may have done that too soon... I thought I'd brought it up to level but when I sanded it, it seemed to have dropped in a bit. Hadn't occurred to me the plastic might still be soft. This kite is giving me no end of headache and it's not even the right scale (it's a 1/100 and I'm a 72 man). I'm only carrying on out of obstinacy now! Thanks again, everybody, for all the help. I don't know what I'd do without the expertise I find here... Probably take up stamp collecting! 2 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now