I've polished four cars with this dual-action polisher with great results. Power lies in between the PC/Megs(weaker) and Griots/Flex(stronger).
I strongly recommend buying a 5" backing plate if you plan on using HF pads. I use 5" Meguiar's microfiber pads. They are more expensive than foam but are much more effective (saves time!).
Harbor Freight Dual Action Polisher:
20% off coupon:
$49.99 - 20% off coupon = $39.99
Max speed: 6400 OPM
Pad diameter: 6"
Spindle thread: 5/16" - 24 UNF
PC 7424 (4.0A)
Meguiars G110v2 (4.2A)
Porter Cable 7424XP (4.5A)
Harbor Freight (5.7A)
Griots Garage (7A)
Flex 3401 VRG(7.5A, forced rotation)
Harbor Freight 6" DA Thread (Autopia forums):
WalMart locations that carry Meguiar's Pro Products (105, 205, DA MF System, etc.):
Best Value Products:
Meguiar's Ultimate Compound 15oz - $7.99 at Target (works great with MF pads)
Meguiar's Ultimate Polish 15oz - $6.79 at WalMart
Meguiars's 105 Ultra Cut Compound 32oz - $24.99 (only at WalMart locations that carry Meguiar's Pro products, also great with MF pads)
Meguiar's 205 Ultra Finishing Polish 32oz - $19.99 (same as above)