Northmount Posted February 24, 2017 Report Posted February 24, 2017 2 hours ago, IvoryCreek said: Help~I tried spar varnish on a plywood mold that I got, but even after 48hr sitting outside on my porch the surface is still sticky. i sanded the surface before I applied the varnish with natural bristle brush , what's going on? also this varnish smells really bad... You got bad varnish. Varnish may have a strong chemical solvent smell, but not rotten. Needs to cure at 65 F or warmer. Tom Quote
Members IvoryCreek Posted February 24, 2017 Author Members Report Posted February 24, 2017 can you recommend a varnish @northmount? Thank you! Quote
Northmount Posted February 24, 2017 Report Posted February 24, 2017 Just now, IvoryCreek said: can you recommend a varnish @northmount? Thank you! Spar varnish is normally a very good varnish. Suitable for exteriors that are subject to some moisture and to sun. Tom Quote
Members Thornton Posted March 2, 2017 Members Report Posted March 2, 2017 Modeling clay that you can bake in the oven would only require your hands to shape. Mistakes would be easy to fix before baking. No sealer required after baking. Win win win. Quote
Contributing Member fredk Posted March 2, 2017 Contributing Member Report Posted March 2, 2017 Well, thats certainly another take on it. Polymer Clay, aka FIMO and Sculpey, are normaly available in 2 ounce blocks. It'd take a quare lot of them to make a shape for a bag tho. But each maker does a special bulk pack of around 1 to 2 pounds in certain colours at a much cheaper per ounce rate Quote Al speling misteaks aer all mi own werk..
Members KittenThrasher Posted March 3, 2017 Members Report Posted March 3, 2017 On 09/02/2017 at 5:37 AM, fredk said: I use MDF and varnish it. A lot of varnish to waterproof it. MDF is very easily cut with minor hand or power tools. Even a medium duty knife will shape it easily. MDF has no grain so it doesn't leave any grain imprint in the leather I do much the same, I use marine varnish and soak the MDF in it rather than paint it on, it takes at least a week to dry but I've had a few molds I made like that for years and used them a lot, they're still going strong. Quote
Boriqua Posted March 3, 2017 Report Posted March 3, 2017 I have made molds from a variety of woods. Poplar was better than the pine. Was smoother. If it was something I was going to do regular though .. I would find a local person with a CNC and have them make it from nylon. MDF is a water sponge, plywood has left unsightly grain marks on my leather, poplar and pine usually only come in certain widths. MDO would be great but its expensive and you still have to seal the edges. There is a Chinese company on ebay that does nylon molds but I think you could get them cheaper and faster from someone locally. Ask on you local craigslist for CNC guys. Display houses, wood shops and a bunch of other fabrication places have em and when I managed a display house we never minded throwing something on the CNC to make a few quick bucks from the machine that might otherwise be sitting there. If you are good with a vector program and you bring a file even better. Quote
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