Heroku Garden - reversing or changing a 'generate scaffold' command

In Heroku Garden, is there a way of reversing or changing a ‘generate
scaffold’ command?
I often find I need to make changes to the scaffolded application but
I do not know how to.

‘script/destroy scaffold Modelname’ from the console doesn’t seem to
For example, I generated a Product scaffold in Heroku Garden.
When I try to destroy it using the console, I get the following error:

script/destroy scaffold Product
SyntaxError: compile error
/home/heroku_rack/lib/init.rb:1: syntax error, unexpected tIDENTIFIER,
expecting kDO or ‘{’ or ‘(’
script/destroy scaffold Product

Does anyone have any ideas on this?
(I’m a Rails/OO newbie)?

Many thanks