Repaints have been around as long as there have been TFs. In fact before TFs there were repaints. As we all know Microman begat Microchange, and Microchange and Diaclone became Transformers. Microman repainted it's figures several times a year - visit www.micromanforever.com for details. Microchange had several versions of Megatron - only one of which became a TF - the cassetes and Blaster. Diaclone mercilously repainted all their cars and planes - there's several diaclone repaints that would have made lovely TFs including a Police Car and Red Sunstreakers, Yellow and Blue Trailbreakers, Red Hoists, Red Tracks and Red & Silver Skids. Many of the others became many of the similar looking TFs we see now.
After the first 2 years of TFs the repainting trail goes cold - with the exception of some Japanese variants - until Micromasters. Here the bases and some of the other MM toys come with repainted MM toys from the 4 packs. Euro Action Masters vehicles and power suitsin the 2nd year are repaints of earlier driver figures. The Thundercracker is particularly hideous. The following year yellow non combining Constructicons show up in the UK. And then the G2 floodgate opens first with repainted cars, planes and dinobots, then following 2 different shades of Constructicons that do combine we get the G2 Aerialbots and Combaticons. G2 Gobots in anything up to 3 colour schemes show up, and when G2 was axed repaints of the Combat Heroes, Laser Cycles and Stealth Bomber were expected.
BW comes along and - via some euro toys showing in new colour schemes in Machine Wars - we get to the 2nd year when 3 deluxes are reused quickly to bolster the toyline - and to good effect, all 3 of Tigertron, Blackarachnia and Buzzsaw are very worth getting. 2 more plus a basic follow in the 3rd year, followed by a couple of exclusives with videos..... The same trick would occur with different toys in the UK. Japan gets BW and repaints Cheetor as a decepticon Shadow Panther, and extensively repaints during BWII and BW Neo - and not just the US toys - their Convoys each get several repaints.
Store exclusives of TM Rattrap and TM2 Cheetor follow in the US, which leads us to the Fox Kids line and a conserted attempt to repaint as many BW toys as possible. Dinobot is worth having, as is the TM Waspinator (he's TM Buzzsaw). The others are somewhat variable but top of the hate list has to be the appalling Waspinator - one set of parts cast in the wrong colour IMO - and the lurid blue Rhinox. OpOp comes back in Beast Machines as Primal Prime, and Jetstorm gets repainted as his own drone the Sonic Attack Jet.
In Japan meanwhile Car Robots had hit, which included repaints of the spychangers, new decos for the remaining MW molds, a repaint of Bruticus (his 4th paint scheme) and repaints in line of the Car Brothers and Megatron. These made it into the US version Robots In Disguise along with some other MW repaints, BM Obsidian and BM Jetstorm back for a third go !
And then came Armada.... Amrmada was the first line where the majority of the toys had repaints. In the line where they first appeared. This is what a lot of people balked at - the idea they're paying out for the same toy just a few months later.... the same thing happened in Energon, and by this time Universe had come along which was a line entirely of repaints of recentish toys, with Robotmasters following a similar idea in Japan.
So what makes a good repaint ?
E Doomlock. A completely different colour scheme and still looks good. Similarly TFU Windsheer is a completely new colour scheme and looks great.
just a few thoughts of mine on the subject, feel free to agree/disagree.
Armada Hoist as Scavenger - green for white, purple for brown, orange & blue
Armada Wheeljack as Armada Autobot Wheeljack - white for black and grey for white, fix the broken Autobot symbol (ditto bellow for that last bit)
Armada Wheeljack as Sideswipe - red for black and black for white
Armada Wheeljack as Sunstreaker - yellow for black and black for white
Night Slash Cheetor as Cheetor - yellow for black & grey, clear green for clear orange.
Waspinator as Bumblebee - yellow for green, black for grey, dark clear blue for the wings and lightpipe. Similar to Buzzsaw but just different enough.
Armada Demolishor as Sixshot - green for Red, white for beige, green for the dark grey and silve for the light grey.
The orange version of Tigatron with the green swapped for red as Beast Wars Hooligan.
Other thoughts for other sizes:
I'd repaint the Machine Wars Wrecker Truck three times: Once in green and orange as Hoist and once in Red & Blue as Optimus and once in Red & Yellow/orange as Rodimus with a flame deco. (these take their que from a KO Iown in the Prime colours with flames which looks better than any of the official colours)
The Star Sabre minicon team twice in clear red and clear purple.
An all white Beast Wars Ultra Optimus Primal as Yeti Ultra Magnus. Email Me with comments or if there's something I've missed !