http://www.ebay.com.au/itm/Auto-Car-Fender-Guard-Roller-Lip-Reforming-Rolling-Tool-Free-Postage-/350545435996?pt=AU_Car_Parts_Accessories&hash=item519e22dd5c
 
I have seen this guy put them on there constantly, and by the looks he has a heap of them... 100 bucks delivered, cant go wrong surely..

^Nice, i'll chip in for it too mate. U have a heat gun? I might invest in one of those too.

nah dont have a heat gun just yet, but im pretty sure u can get them rather cheap from bunnings... But in saying that, if you wanna get the heat gun, ill get the guard roller, we can try on mine first if you like and see how we go with cracking paint, etc, as i am not too fussed as i am looking at going black soon anyway...

Yeah might go to bunnings this week to look for one. They're pretty handy for other things too.
Paint shouldnt crack if we heat it up enough 
Black should look tough!

yea heat gun should be <$30 at bunnings.  It's really hard to not crack the paint I found.  I've seen a mate's that was done professionally, but that cracked too - the roller gave a smooth finish. both cracked.  I'd prefer to use a roller next time, but taking my time with a rubber mallet was ok too, it just takes time :P

Ah great idea everyone. One thing I can recommend which was spoken from a professional was to take your time and don't try adjust the angle of the roll too much at first, adjust bit by bit. The more pressure you put on trying to bend the panel in one go, the worse its going to turn out and the more likely you'll crack the paint.

Josh - did you still want me to get one of these? I am prob going to purchase one on the weekend...

Well if you think it'll be handy for your car also that would be great. I'm happy to chip in also mate.
I'm going to grab a heat gun this weekend too.

So on the weekend beagle_senior (thanks again mate) and I rolled my rear guards using a eBay guard roller and a heat gun... Took no time at all to do and turned out very well I thought. Just make sure you heat the paint up properly, and it wont crack. So I still don't understand why these tyre places charge so much ($50-80/arch) to do it...
 

 

 

 

 
No more shredding my poor RS-Rs when blasting through the hills! :D

For the record.... I think the issue is the 40r18..... i have 40 profile on my 17s, and that is ideal for an MR2.

If you're going 18s, you really should be using a 35 profile. It will be more expensive, but it will prevent these sorts of issues.
I made that mistake with 50r16s too. They scrubbed bad....

Looking forward to seeing how this pans out Alex and Josh... any idea when you might do it?