ok here goes
remove the seats and carpet from the car so you can see all of the sound deadening tar now you are ready to start
there are 2 basic methods of removing the sound deadening tar from your car
1 is heat
2 is cold
1- heat generally leaves a messy residue all over the flooring ( i didnt do it this way do im not too much help here)
but here goes
using a heat gun (or hair dryer {much slower}) and a 1-2" putty knife or a wide flat screwdriver heat the tar up so it is pliable and pry it up with the putty knife keep doing this untill its all gone
2- cold is a little more expensive but generally leaves everything much cleaner (this is the method i used)
it helps to not do this on a 90*+ day like i did
get some dry ice from a local supplier (check the yellow pages) i got 30lbs (about $35 worth) i had lots left over but i only had the 2 seats in the del sol four seat cars will probly use all 30 lbs
******WEAR GLOVES****** A block of dry ice has a surface temperature of -109.3 degrees F (-78.5 degrees C) this will pretty much fuck you up if you touch it.... so dont.... also its CO2 and as it "melts" it turns directly into carbon dioxide gas.... use it in a decently ventalated area.... and take frequent breaks to BREATH
lay the dry ice on the tar for several minutes (at least 10) i found covering the largest area i could then removing small areas at a time worked best... this keeps everything cold just move the ice as you go
using a chissel or large flat screwdriver chip at the tar and large chunks of it should come away nice and cleany with little or no residue left on the floor... repeat till your done