so, I am new to this. First I made a mold, which was surprisingly easy and looks pretty good to me. But then the problems start as I wanted to make resin copy's.
My first attempt went not so good because, after filling the filler hole, when curing the resin pulled back and I don't have a left valvecover, plus a lot of airbubbles.
My second atttempt isn't much better, still missing my valvecover and even though it has some more detail, it still doesn't look good.
Both times, the resin looks like honey (color wise) and stays stickey, even after 8 hours in the mold. I tried to make a 1:1 mixing ratio based on weight and 1:1 mixing ratio on volume, but both with the same result.
I inject my resin via a spout(?) and have 2 shafts in the top of the mold, one to release air or so I thought and one to fill. I will add pictures later.
Please help me to understand resin and how I can make a decent copy.
The quick way to tell if your resin is "polyester" is the odor of it. Polyester resin will smell just like the 2-part body putty used in shops that repair dented sheetmetal on real cars--that putty is polyester based.
I'm pretty certain that you can access urethane or polyurethane resin in The Netherlands--there is quite a bit of resin casting done in Europe for model builders.