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Discuss all areas of historical miniature painting and painting preparation.
Help! Large scale Resin figure/bust problems
New Hampshire, United States
Joined: June 06, 2002
KitMaker: 1,225 posts
Historicus Forma: 157 posts
Posted: Tuesday, August 14, 2018 - 12:56 PM UTC
Awhile back I had purchased a box of resin kits,mainly busts and figures 120mm and larger.
For the price you really couldn't pass it up so I took the box home and started to look thru the entire box to see what I had paid for. I would have to say for the price I paid I got my moneys worth in the first 5-6 figures.
Once it was looked over I found a couple of figures that I hadn't seen in years so I didn't want to part with them until a rainy day.Well the other day was rainy,LOL, I took them out and found 2 of them the resin had a VERY light orange peel texture on them.First I though use sand paper to get the resin smooth,but unfortunately there was way to many fine details that would be ruined.
So with this in mind do any of you guys know how to eliminate this problem? I also heard that you can use lacquer thinner to smooth out the orange peel....I just don't know about the one.
I really hope you guys can help,because I don't want to throw away these 3-4 items I am really trying to save each and everyone of them.
Thank you
Washington, United States
Joined: March 15, 2009
KitMaker: 3,670 posts
Historicus Forma: 25 posts
Posted: Tuesday, August 14, 2018 - 03:31 PM UTC
So, what you are dealing with sounds like a chemical “ bloom” on the surface of the resin, which is usually the first sign of severe deterioration. This results from the chemical formulation of the resin as its exposed to heat and oxygen over time. Firstly, it’s easy to deal with— if the “bloom” isn’t too bad, more like a fine coating of dust, I’d just leave it, but I’d get a good coating of a lacquer based primer on it to seal it in and prevent further damage. If it’s gone to the “grainy” stage, like fine sand, use warm water to rinse off the surface features— don’t use soap!! Then take a discarded soft toothbrush and gently “scrub” the figure. Soaps almost always have a surfactant. Chemical surfactants are designed to break down grease and since resin is made from petroleum products (like rubber is), the surfactant in the soap may increase the “bloom” effect. Once the figure has been gently “scrubbed”, with warm water, and allowed to dry completely, give it the lacquer primer treatment. This isn’t a guarantee the deterioration will stop, but it will be better than letting it go. I’ve got a few resin figures which developed this problem that are going on 30 years old now, and show no sign of deterioration after this treatment. A lot of folks might ask how I know about this, let’s just say I have several experiences in my professional life with deteriorating rubber and resin— mostly from using dish soap as a cleaner.
VR, Russ