Spodger Posted March 7, 2013 Share Posted March 7, 2013 Apologies if this has been dealt with elsewhere - I have searched but not found. I'm about to make my first model for 37 years and I vaguely recall being aware of MRA and the need to wash all the parts with mild soapy water before assembly/painting. I'm sure I never did but I don't recall having a problem painting kits (airfix/tamiya) with enamel paints. The only time I remember having an issue was with painting the sets of small figures (infantry, desert rats etc. in softer plastic). Is it always present on all kits? If it is, can you see or feel it or detect it in any other way? Or, should I just wash them all anyway just in case? Link to comment Share on other sites More sharing options...
Test Graham Posted March 7, 2013 Share Posted March 7, 2013 It isn't normally a major problem, and it's not something I normally do. However, better modellers do so maybe that's not saying a lot, and it might explain the odd failure of a paint to take hold. It was particularly commented on with some of the older cruder East European kits. Doing it certainly won't hurt - as long as you make sure to rinse all the soap off too. Link to comment Share on other sites More sharing options...
Spodger Posted March 7, 2013 Author Share Posted March 7, 2013 Thanks, Graham! I wasn't expecting such a swift reply. I'll see how it goes without the washing - I have a couple of practice kits. Link to comment Share on other sites More sharing options...
pte1643 Posted March 7, 2013 Share Posted March 7, 2013 As Graham really... I don't usually bother with IM plastic kits, but ALWAYS do with Resin. Certainly not bad practice though. Link to comment Share on other sites More sharing options...
chadders Posted March 7, 2013 Share Posted March 7, 2013 I always wash my models prior to paint as a habit. I know full well that the first model I don't wash is going to be the one where I have paint problems Link to comment Share on other sites More sharing options...
Test Graham Posted March 7, 2013 Share Posted March 7, 2013 When pte1643 said "resins" I had one of those moments. I have a very strong feeling that I now know why that Sherman wouldn't take the paint. Link to comment Share on other sites More sharing options...
Scratchbuilder Posted March 8, 2013 Share Posted March 8, 2013 I always use self-etch primer anyway, so the problem doesn't occur, but resins have a surface which is naturally waxy and has some silicon residue from the moulds. Usually resin doesn't need release agent when moulding as the only thing that silicon sticks to is more silicon, as you'd know if you ever made a 2 part silicon mould, with insufficient release agent betwixt the twain! Martin 1 Link to comment Share on other sites More sharing options...
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