for belts a wipe off with some WD40 does the trick.
as for parts being abused that goes with teh territory
for silicone for diff recommendations check out a thread on the car brand or model you have.
casterracing EX-1 Pro, SP Silver Arrow
TOP Racing Scythe, SP 17.5, SP GT Pro 2.0
TOP Racing Scythe, SP 4.5 V2, Hobbywing Xerun 120SD 2.0
TOP Racing Scythe, SP 13.5, Hobbywing Xerun 120SD 2.0