That must be a common thing as I filled an order not too long ago for someone that got the same sort of gm hoard in the mail.
I use acrylic model paints on my resin parts. Model master and floquil are my favorites. I sometimes will put a primer coat of white on em prior to painting using the same paint. When I paint em white, I do one coat, usually thin, just to give the second coat something to stick to. Sometimes, the parts are just slightly oily, about like model kit parts that have mold release still on em. I suppose you could wash em prior to painting but I never do.
Now for some pics of the orders that I shipped out today.These are three different orders for ebay members. Now, you know that everyone gets free parts. how I distribute em on ebay depends on how much they order and how they pay. if they buy multiple sets and pay full shipping prices for each set rather than combined shipping, they get a larger number of freebies.
shot one shows the paid for parts on the right and the freebies on the left.
shot 2 shows the arc trooper parts set with one free part, the tvc westar blaster
the last order was big enough that I needed two shots for it.
shot 3 shows the paid for parts
shot 4 shows the freebies