1250 SCALE MESSAGE BOARD
[ Post a Response | 1250 SCALE MESSAGE BOARD ]
Re: 3-D Gadila
Posted by Roger Dawson on 1/7/2018, 1:40 am, in reply to "Re: 3-D Gadila
As a tretired scientist, I no longer have the resources of a fully equipped research lab at my disposal but my experience with polymers over the years tells me that "Strong White & Flexible" is a polyamide or "nylon". The 3-D printer fires melted plastic at the target and the globules stick together to build up the model. The plastic is setting as it leaves the printer nozzle and is too viscous to flow over the target, so you get the blobby finish. The flexibility of the plastic makes it difficult to sand to a smooth finish but worse still is the space between the globules (imagine balls in a box) which will hold a large amount of liquid paint. Now I have only bought two SWF models and one of those was painted by the maker, so I cannot speak from personal experience but I would use a "Solvent-free" sanding sealer on any future SWF models before sanding and painting. This will produce a harder, less flexible model which will be easier to sand and paint. I have already bought a sealer bottled by "DeLuxe Materials" for this purpose but so far I have only used it on wood and it is not as good as a cellulose based sanding sealer for balsa wood but the cellulose solvent might dissolve nylon. Once you have filled and sanded the SWF, the high filler content should proved a suitable base to glue other fittings with cyanoacrylate glue andwater-based paints should adhere to the new surface.
I should appreciate feedback from anyone who tries this solution.
: In my limited experience, there are different
: levels of quality in the mixes used in
: different Shapeways products. In short, not
: all SFW products are equal. Some are
: smoother and easier to work with than
: others. And then there are the occasional
: bad batches. As a result I now avoid SFW
: MACOMA was MR. I think GADILA was GA, but
: Iím not certain.
: --Previous Message--
: I bought a Gadila on Shapeways printed in
: "strong and flexible white"
: Unlike the previous "frosted ultra
: detail" models I have attempted, I
: cannot seem to get a smooth surface for
: I have tried the same techniques that I have
: used on the FUD models without success
: (sunlight, lighter fluid, sanding,
: primer,etc). Do you pioneers out there have
: any advice?
: Assuming I can get it painted, I am having
: no luck at all getting plastic strip for the
: gun tubs to adhere. I have tried airplane
: cement and superglue and they break off with
: the slightest touch. I fear that the 20mm
: guns will fall off even easier. Very
: And finally, I have found pictures
: purportedly of both Gadila and Macoma which
: are the same picture so can anyone confirm
: that Gadila's deck id is MR?
: Thanks for any assistance.