Thankee for the kind words. I'm loathe to take issue with my betters, but I think the issue of ISP bleaching anything beneath pigments is kind of abstract: you are, after all adding pigments. Nor do I think the amount used (really just to wet the brush) would cause harm to well cured surface. I've done a lot of comparisons with MIG's "Thinner for Washes" and "Fixer." The first is something very close to Tamiya A-20 Acrylic thinner, which is mostly ISP. It will fix pigments, but they can be removed with a stiff brush and water: they're also closer to the original color of the pigment. MIG Fixer will hold pigments for good and unless I need a nose transplant that stuff is turpentine. It fixes pigments for good and darkens the stuff a little. I find it very useful - the pigments set with "thinner" usually add the very top coats of a build up made with "fixer." Interestingly, the newest MIG web page advertizes "Thinner for Washes" as a standard thinner that could be used to make an acrylic wash - as you suggest. They have added acrylic resin as a fixer. That works nicely too, although any matte medium from Liquitex, Golden, Scenic Express or even Vallejo will do the same thing because any of the acrylic mediums are resins of some kind. Naturally MIG's rendition will top the chart in price, but there's be enough there to make many a tank. Can't encourage people enough to watch "Acrylic Weathering Techniques" on YouTube and listen to Mig J himself pontificate on using water based acrylics for all weathering. Because Com.Art fits the bill for washes or even filters, I've found I use very little enamel or oil based products any more. I think they remain best for some kind of shadows and streaking, but less of that stuff is more for me. (As noted I don't have a spray booth and have really learned to like modeling with almost no odor.
But I still haven't got the scale effect down right. I'm going to give any AFV some proper weathering and a good dusting because there were no clean tanks. I've found this process will always darken the kit a little so I've got to train myself to lighten the model more during the modulation stage.
Eric