My post was and any in the future are intended to provide another pair of eyes relative to often we
all get too close to what we believe to be scale three views instead of photographs which are in reality
much more valuable during this critical stage of a project.

There is no right or wrong way of doing things. It all depends on the materials being used. There are
a lot of fillers and surfacers which can not be used with Styrofoam brand of extruded polystyrene or
the white beaded polystyrene you are using.

By the way, those two materials are not the same and require completely different working methods.
Be aware that any thing typically used with commercial auto body repair will contain MEK or similar
chemicals which are not compatible with polystyrene and will turn it into goo...

This project, having already had a near death experience...would benefit by asking your local auto
repair/paint shop, or an experienced foam medium modeler if what you are considering dissolves
what you have already constructed with. You are using polystyreme, not polyurethane foam. Its a
difficult change to evolve to thinking three times before attempting to do something as the one doing
could be the projects undoing.

A typical credo at this point would be when in doubt....test first. When testing permit chemicals to
completely out gas before attempting to work with them. Typically this is 24 hours unless labels
state longer.

Here again just my personal opinion...among many.