I agree with 94BlkStang, I use the same routine on my Cobalt as I do my BMW. I do a good wash, clay, hit any really bad spots with the
Sonus products, then
AIO and
SG. Tell your Dad not to use simple green anymore for the wipe down because it will remove any produce you have applied. I swim around my boat right before it comes out of the water and wash it with a boat/RV soap that is bio-degradable.