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Found 2 results

  1. I'm contacting the BM Brains Trust to see if someone can give me a steer. I've been using Pledge to dip canopies and have found it works ok but have recently come across a problem. I've dipped a canopy and wicked the surplus off (or at least I thought I had) but now it's dry, there seem to be a couple of small runs, or distortions, on the part. I've re-dipped it and tried washing it off in warm soapy water as suggested in this thread that Shaun began some years ago, but it hasn't lifted it off. I've decided to give ammonia a try as it's listed as a removal agent on the back of the Pledge bottle but most everyday window cleaning products seem to have had ammonia replaced with vinegar, and I can't find a screenwash that contains it either. I have found some household ammonia on Amazon though. From what I gather from the Q & A's, it's 5-9.5% strength (even though it's advertised as 100% ammonia) so I'm wondering: (a) Should I dilute it further before dipping the canopy in it and (b) how long should I leave it before washing it off? The canopies in question are for a discontinued 1/72 scale TSR2 from Airfix, so I know I won't be able to get a replacement part and I don't want to ruin them! Does anyone know please?
  2. Having endured a long, lonely trawl around the cleaning and detergents sections of local supermarkets, looking for something containing ammonia to strip acrylics and clean up brushes, I got my hands on a litre of 9.6 - 9.9% ammonia solution. Any idea by how much I am going to have to dilute this stuff further for my intended use without risk to my models, modelling supplies, and small and delicate pink body? I am well aware of the handling precautions, but even so... Do anionic tensides do a similar job? That's the active ingredient in the contents list for just about every cleaner available hereabouts. I was last in a chemistry lab in 1979 and would appreciate some assistance here. TIA, Steve
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