natural logs

[whitruss]

hey everyone!
so long story short, i have a natural branch that i was planning on using as suport in my terrarium, i washed it with water/bleach and then put it under boiled water, now after some time in my garage i found that it has begun to develop some kind of fungos in the parts there were cutoff, so my question is
after i clean and desinfect then again what should i paint then with to prevent that from happening?
can someone help me please?

 

[Psychedelic Chams]

I suggest a blow torch burn the outside then no need for strong chemical

 

[whitruss]

burn it down you say?

but would it resolve the problem, wont the fungus appear once i have my setup running with water and higher temps?
when i say paint i meantsome kinda of acrylick based polish or something like that