What techniques do you suggest/successfully used for hiding seams where either boards come together or there are small gaps? Thanks for ideas or other resources.
Probably the most important issue is to secure them tightly together with a plate/cleat from underneath using screws. I like to use joint compound mixed with a little celluclay and fill the gap. This has cracked on me in the past but once the ground cover has been applied and secured with a liberal amount of mod podge or white glue I never see it. These two glues seem to have a bit of elasticity about them preventing the crack from showing. I'm sure others will have more info for us on this.
Joint compound. I borrowed an idea from Wolfgang's module pictures and added 3/4" thick borders (fascia?) around three tables that needed to be joined. This made it very easy to match height and shim as needed for smooth transitions. Then just added some light joint compound. That way the spackle isn't bridging big gaps or seams(more likely to crack) but instead is simply filling a small profile and less likely to crack.
You can use anything that can be spread, injected, or extruded that will harden sufficiently that it won't need to be dammed, preferrably something that will take paint or glue atop it, and to which you can affix scenic materials, including tree armatures...so that means it should be drillable, ideally. Part of making it all 'seamless' is the ability to cover it realistically, and that means being able to plant the odd tree in it. You could use a mixable wood putty, sculptamold, spackle and joint compound, even acrylic latex caulking.
My vote would be for decorators caulk, especially if there is any chance of even the slightest movement. Good luck, let us know what you go with, and show your results with pictures! Phil
