Undercoating Application

[Ct54531@aol.com]

I've been meaning to ask this for a while and seeing the thread on removal 
prompts me to do so. But it's the opposite of what's being discussed. 
Is there a heavier undercoat than what I've been able to find so far in my 
local parts store. The rubberized stuff is thin and - well, I'd like 
something heavier/more solids to help mask weld lines, rivets, machine 
screws, etc. Is there something with more to it  than the quite thin stuff 
I've been able to find so far?
Thanks. 

Jim 65 4A
CT54531L