[Bonos]

priobe,

When you are sanding/preping NEVER use sand paper with your hand always use a block .On large areas such as hood and trunk and doors the longer the block the better the finished prep.
You might want to use "evercoat" glaze coat to resurface low spots because it will do a better job than bondo because when dried it is not as thick and is easier to resurface.It is applied like bondo however it is alot thinner when mixed and applies easier.
Instead of using bondo(name brand) consider a plastic filler called "Z GRIP" this product is mixed and applied like bondo however the finished product is resurfaced with less effort.
Please be real careful when removing mold ridges that you don't go down to far and create numerous flat spots on your body.
When you start sanding with 220 grit paper you may want to consider wet sanding and blocking with 320 paper for a better prep and finish.
I am suggesting thes ideas only because they worked for me and were suggested by a highly skilled and sought after local painter .

Bonos