I really should take more ‘before and after’ type photos of these little experiments because it’s interesting to see what a project looked like at the start and what it ended up as. My latest resin casting experiment started out looking like that over there on the right. Basically it looks like a vaguely iridescent plastic blob in a tub, and the end result is in that photo at the top.
If you want to see what it looks like lighted up there’s a short video way down at the end of this.
I didn’t take much care in designing this thing, I just basically chucked some wood scraps I thought were neat looking into the mold, mixed up some resin and dumped it in and this is what I got. I really need to take more care in planning out the actual design of what I want, especially for something that’s going to have a light in it as this one does. It doesn’t do much for the look of a lighted piece if there’s too much wood blocking the light from showing through.
My third experiment is currently in the pressure tank and should be ready for unmolding by Wednesday. This one is taller and wider than the previous two. And unlike the first two this one was actually done with some planning. The current one is going to be interesting for a couple of reasons. First it’s going to be more resin than wood. The previous two were mostly wood scraps with the voids filled with resin. Second, it’s a considerably larger pour than the others, about 40 ounces in total. I already don’t like the color. I had about 5 ounces of resin left over sitting in the mixing cup and looked at this morning and I’m disappointed with the coloring. But I won’t know for sure until I get it unmolded, shaped and lighted up, not just tea light holders like the first two. This one is designed to be an actual lamp. I already have a LED lamp insert ready to go for this one.
So, what have I learned?
First, there are an enormous number of different manufacturers and types of resin out there, and most of them aren’t going to be suitable for the kind of thing I’m doing. A lot of the ‘hobbyist’ kinds of resins are only intended for small, thin pours or for coating table and counter tops and that kind of thing. What I am doing are so-called ‘deep pours’ of two or more inches in depth, and the resin being used must be formulated to work that way.
Some of these resins are toxic. Read the specifications very, very carefully and follow all safety instructions. The stuff I’m using has no VOCs or fumes and is safe to use indoors with proper ventilation. Some of the stuff is downright nasty. So make sure you are aware of any safety concerns before using it.
Resin is not difficult to machine on the lathe. I’ve used both steel and carbide tools with equally good results. As long as the tools are very sharp there doesn’t seem to be a problem. It is, however, difficult to sand, and can clog sandpaper quickly, especially if spinning the object too fast in the lathe. What seems to happen is that friction will heat up the resin to the point of melting into the sandpaper and clogging it up. Keep lathe speed down, way down.
The longer a resin project sits, the more prone it is to chipping. The curing process continues long after the object is solid enough to work with, it seems. Of course this is going to be different with different types of resin. What works for me and the product I’m using may not work for others. With the stuff I’m using, the “sweet spot”, so to speak, seems to be 4 – 7 days. Before that, it’s too soft to work with. After that chipping becomes a concern. I can still work with it, but I have to be very careful, use very sharp tools, and be patient.
If you scrounge around Youtube and look at videos of guys turning resin projects, you’ll see them going to extraordinary, even obsessive lengths to polish the stuff, sanding it up to 4,000 grit or even higher, wet sanding (sorry, I did enough wet sanding when I worked in an autobody shop, I sure as heck don’t want to start dealing with that mess now) then using abrasive polishing pastes and buffing wheels and I don’t know what all else. That all seemed just a wee bit excessive to me. I rarely sand wood beyond 240 or 320 grit. Experience has told me that going farther than that isn’t going to make much difference, if any at all, on the final finish. And I wondered if that might be the case with resin. So I’ve been sanding my resin projects up to about 400 grit, then sealing the wood, a quick sand at 400, then carefully clean the piece and then slap a coat of wax on it and buff it out, and the stuff looks just as shiny and nice to me as the projects where these guys spend hours, even days polishing to perfection.
I only have two completed resin projects, of course, so my experience is extremely limited, so there is every chance I’m wrong about this. But so far I don’t see any reason to go to the extraordinary lengths some of these guys resort to in order to get a high gloss surface.
Anyway, I’m having fun with this and just ordered about $200 worth of resin so I can keep playing around. Hopefully this batch will be packaged better and won’t arrive with a punctured bottle.
Oh, the cactus! Almost forgot about that. It’s just coming into blossom right now and it looks like it’s going to be spectacular once it comes into full bloom.
Weather has been utterly amazing the last few days. Temps in the low 70s, sunny. It’s hard to believe we’re on the cusp of winter. We’ve been enjoying it while we can because we know what’s coming. Went out and drove around for a while in the convertible the other day. I actually put more miles on the bicycle this year than I did on the Corvette. That’s not necessarily a bad thing, but it is a bit disappointing. All of our travel plans were disrupted by the virus. So we adapt and go on, right? That’s all you can do.
Here’s a short video of the new project while lighted up.